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Did you know that Radium Hot Springs maintains a year-round temperature of 35°C to 41°C (95°F to 106°F) despite being at 2,073 meters (6,800 feet) elevation where winter temperatures regularly drop below freezing? This remarkable natural phenomenon has drawn visitors for centuries to this remote spot along the Upper Colorado River.
Radium Hot Springs offers something truly special. Unlike commercialized hot spring resorts, this destination provides an authentic wilderness experience.
The warm springs flow naturally into the Colorado River. People come here to soak in geothermal waters surrounded by untouched mountain scenery.
This guide covers everything you need to know. From the best time to visit to where to stay and what to do in the area.
Whether you want a relaxing soak after a long hike or plan to explore the surrounding wilderness, Radium Hot Springs delivers an unforgettable Colorado experience.
Getting There & Planning Your Journey
Reaching Radium Hot Springs requires some planning. The area sits in a remote section of Grand County, Colorado.
Most visitors arrive through one of these nearby airports:
- Denver International Airport (DEN) – 193 kilometers (120 miles) southeast, approximately 2.5 hours driving time
- Eagle County Regional Airport (EGE) – 121 kilometers (75 miles) west, approximately 1.5 hours driving time
- Yampa Valley Regional Airport (HDN) – 137 kilometers (85 miles) northwest, approximately 2 hours driving time
From these airports, you will need a vehicle. Rental cars are available at all three locations.
The drive to Radium Hot Springs takes you through spectacular mountain scenery. Highway 9 runs north from the town of Kremmling, then you turn onto Trough Road to reach the recreation site.
Road conditions vary by season. Summer and fall offer the easiest access. Winter requires four-wheel drive capability and chains may be necessary.
The final stretch along Trough Road is unpaved. The road can become rough after heavy rain or during spring snowmelt. High-clearance vehicles are recommended but not absolutely required during dry conditions.
Gas stations and supplies are available in Kremmling, located about 24 kilometers (15 miles) south of the hot springs. Stock up before heading to the area since services are limited near the springs.
Best Time to Visit & Weather Tips
Recommended Seasons
The best time to visit Radium Hot Springs depends on your preferences. Each season offers unique advantages.
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Late Spring (May to June): Spring brings mild weather and flowing rivers. Wildflowers bloom across the meadows. The area is less crowded than summer months. Daytime temperatures range from 15°C to 24°C (59°F to 75°F).
Early Fall (September to October): Fall provides ideal conditions for most visitors. The weather stays warm during the day, reaching 18°C to 26°C (65°F to 79°F). Nights turn crisp and cool. Aspen trees transform the landscape with golden colors. Wildlife becomes more active. Crowds thin out after Labor Day.
Summer (July to August): Summer attracts the most people. Expect warm days averaging 27°C to 32°C (80°F to 90°F). The Colorado River flows strong, perfect for fishing. Camping spots fill quickly on summer weekends. Arrive early to secure a good location.
Seasons to Avoid or Plan Carefully
Winter (December to March): Winter visits require serious preparation. Snow covers the area heavily. The road becomes impassable without four-wheel drive. Many people avoid winter visits unless they have winter camping experience. However, soaking in hot springs surrounded by snow creates a magical experience for those willing to brave the cold.
Early Spring (March to April): Mud season makes access difficult. Roads become extremely slippery. The area sees fewer visitors during this time. Wait until late May for better conditions.
Weather Considerations Throughout the Year
Mountain weather changes quickly at this elevation. Afternoon thunderstorms are common in summer. Bring layers regardless of season. Morning temperatures can be 11°C to 17°C (20°F to 30°F) cooler than afternoons.
The hot springs maintain consistent temperatures year-round. You can soak comfortably even when air temperatures drop near freezing.
Notable Annual Festivals
While Radium Hot Springs itself hosts no formal festivals, the nearby town of Kremmling offers several annual events worth planning around.
Kremmling Days (July): This community celebration features a parade, barbecue, live music, and local vendors. The event showcases the Western heritage of Grand County. Contact: Kremmling Area Chamber of Commerce at (970) 724-3472.
Fall Festival and Chili Cook-Off (September): Local restaurants and home cooks compete in this popular event. Enjoy live entertainment and arts and crafts vendors. The festival coincides with peak fall colors in the area. Contact: (970) 724-3472.
Upper Colorado River Wild and Scenic Stakeholders Group Events: Throughout summer, various conservation and education events take place along the Upper Colorado River corridor. These include guided nature walks and river clean-up days. Contact the Bureau of Land Management Kremmling Field Office at (970) 724-3000 for schedules.
State Bridge, located near Radium Hot Springs, sometimes hosts informal gatherings of fishing enthusiasts and outdoor recreation groups. Check local bulletin boards in Kremmling for upcoming events.
Getting Around Locally
Transportation around Radium Hot Springs is limited to personal vehicles. No public transportation serves this remote area.
Your vehicle serves as your primary way to explore the region. The unpaved roads require attention to driving conditions.
Along Trough Road and Warm Springs Road, you will find one vehicle width paths in many sections. Drive slowly and watch for oncoming traffic. Pull over at wider spots to let others pass.
Parking at the Radium Recreation Site is informal. Designated parking areas accommodate about 20 vehicles. During busy summer weekends, the parking area fills by mid-morning.
Walking from the parking area to the hot springs takes only about five minutes. The trail is relatively flat and easy to navigate.
For exploring the Upper Colorado River corridor, many visitors bring bicycles. Mountain bikes handle the dirt roads well. Cycling offers a quiet way to observe wildlife and enjoy the scenery.
Boat access to the river is possible for kayaks and canoes. The put-in point at State Bridge sits about 11 kilometers (7 miles) upstream. Several rafting companies in the region offer guided float trips through this section of river.
Cell phone service is unreliable or nonexistent in most of the area. Download maps before arriving. GPS devices work better than phone navigation.
Where to Stay
Camping at Radium Recreation Site
Camping provides the most authentic way to experience Radium Hot Springs. The Bureau of Land Management maintains the Radium Recreation Site with basic facilities.
The site offers dispersed camping along the Colorado River. No designated campsites exist, but several established camping areas show where previous visitors have stayed.
Facilities include vault toilets and a few picnic tables. No running water is available. Bring all water you need or bring purification equipment for river water.
Camping fees are minimal. The recreation site operates on an honor system. Drop payment in the fee box at the entrance.
Group campsites can accommodate larger parties. Space out tents to maintain the natural setting. Keep noise levels down to respect other campers and wildlife.
Nearby Lodging Options
For those preferring indoor accommodations, Kremmling offers several options.
Hotels and Motels: Basic chain hotels in Kremmling provide clean, affordable rooms. Expect amenities like Wi-Fi, breakfast, and parking. Prices range from $80 to $140 per night depending on season.
Vacation Rentals: Private cabins and homes are available for rent in the surrounding area. These often provide more space and kitchen facilities. Popular with families and groups staying multiple days.
RV Parks: Full-service RV parks near Kremmling include hookups for electricity and water. Some offer dump stations and shower facilities.
Book accommodations in advance during summer months and fall color season. Last-minute availability can be limited in peak times.
Dining & Local Cuisine
Dining options near Radium Hot Springs are limited to what you find in Kremmling. The hot springs area itself has no restaurants or food services.
Plan to bring food for picnics at the springs. Pack a cooler with sandwiches, snacks, and plenty of water. Many visitors enjoy cooking over campfires in the evening.
Kremmling Restaurants
Kremmling offers several local eateries serving hearty Western fare.
The Moose Cafe: This local favorite serves breakfast and lunch. Try their biscuits and gravy or green chili. The atmosphere is casual and friendly.
Riverhouse Grill: Offers dinner service with steaks, burgers, and Colorado craft beers. The riverside patio provides pleasant outdoor seating in summer.
Pizza and Subs: Several pizza places deliver standard American pizza and submarine sandwiches. Good options for feeding groups after a day outdoors.
Local Specialties
Colorado cuisine emphasizes locally sourced ingredients when possible. Rocky Mountain trout appears on many menus. The fish comes from nearby streams and lakes.
Green chili is a Colorado staple. This spicy stew contains pork, peppers, and seasonings. Locals pour it over burritos, eggs, or eat it as soup.
Bison burgers offer a lean alternative to beef. Several restaurants feature bison raised on Colorado ranches.
Stock up on groceries at the Kremmling market before heading to the hot springs. Fresh fruits, vegetables, and sandwich supplies ensure you have good meals at your campsite.
Attractions, Sightseeing & Activities
The Hot Springs Experience
The main attraction is soaking in the natural warm springs. Multiple pools form along the river edge where hot spring water mixes with cooler river water.
Water temperatures vary depending on where you position yourself. Pools closer to the spring source run hotter, reaching 41°C (106°F). Pools farther away mix more river water and stay around 35°C (95°F).
The pools are natural formations. Rocks and sand create the pools, which shift slightly with river levels and seasonal changes.
Bring water shoes to protect your feet from sharp rocks. The bottom can be slippery in places.
Most people spend two to four hours at the springs. You can alternate between hot soaks and cooling off in the river.
Fishing the Upper Colorado River
The Colorado River near Radium Hot Springs offers excellent fishing opportunities. The river holds healthy populations of brown trout and rainbow trout.
This section of river is designated as Gold Medal Waters by Colorado Parks and Wildlife. The designation recognizes exceptional fishing quality.
Fly fishing is the preferred method. The river features classic runs, riffles, and pools that hold fish year-round.
A Colorado fishing license is required. You can purchase licenses online or at sporting goods stores in Kremmling.
Fishing near State Bridge is particularly productive. The area from State Bridge to Radium offers about 16 kilometers (10 miles) of public access fishing.
Wildlife Viewing
The Radium area falls within State Wildlife Area boundaries. Wildlife watching opportunities abound throughout the day.
Common sightings include mule deer, elk, bighorn sheep, and various bird species. Eagles and hawks soar overhead hunting for prey.
Early morning and evening provide the best wildlife viewing times. Animals come to the river to drink during these cooler periods.
Bring binoculars to observe wildlife from a respectful distance. Never approach or feed wild animals.
Museums, Cultural Spots & Festivals
The Radium Hot Springs area itself contains no museums or formal cultural sites. The attraction is purely natural and recreational.
However, the broader region offers interesting historical and cultural experiences.
Kremmling Historical Museum
This small museum in downtown Kremmling preserves the history of Grand County. Exhibits cover ranching heritage, mining history, and the development of water projects that shaped the region.
The museum operates on limited hours during summer months. Admission is free, though donations are appreciated.
Native American Heritage
The Upper Colorado River valley has been inhabited for thousands of years. The Ute people lived and hunted in this area for centuries before European settlement.
While no specific cultural sites are developed for tourism, understanding this history adds depth to your visit. The hot springs held spiritual significance for indigenous peoples.
Ranching Culture
Modern ranching still defines much of Grand County culture. You will pass working cattle ranches on your way to Radium Hot Springs.
Respect private property boundaries. Close all gates you pass through. Ranching remains the economic backbone of the area outside of tourism.
Nature & Outdoor Experiences
Hiking Trails
Several trails near Radium Hot Springs offer hiking opportunities ranging from easy walks to challenging climbs.
The trail along the river provides an easy, relatively flat hike. You can walk upstream or downstream from the hot springs. The path follows the river for several kilometers in each direction.
More adventurous hikers can explore trails climbing into the surrounding hills. These offer expansive views of the Colorado River valley and distant mountain ranges.
Trail conditions vary. Some paths are well-maintained, while others are informal routes created by previous hikers. Carry a map and plenty of water.
Elevation here sits around 2,073 meters (6,800 feet). Visitors from lower elevations may need time to adjust. Start with shorter hikes before attempting longer treks.
River Activities
The Colorado River offers more than just fishing. Kayaking and rafting are popular activities on this section of river.
The stretch from State Bridge through Radium is classified as Class II-III rapids. These moderate rapids are suitable for intermediate paddlers.
Commercial rafting companies based in nearby communities offer guided trips. Half-day and full-day float options are available.
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Private boaters can put in at State Bridge and take out below Radium. The float typically takes three to four hours depending on water levels and how much time you spend fishing or swimming.
Photography Opportunities
Radium Hot Springs provides stunning photography subjects. The contrast between steaming hot springs and the cold mountain river creates dramatic images.
Sunrise and sunset offer the best natural lighting. Morning mist rising from the warm springs looks particularly magical in early light.
Wildlife photography requires patience and long lenses. Position yourself quietly and wait for animals to approach the river.
Landscape photographers should explore the surrounding hills for elevated viewpoints overlooking the river valley.
Money Saving Tips
Visiting Radium Hot Springs can be remarkably affordable if you plan wisely.
Free and Low-Cost Activities
The hot springs themselves are free to use. No entrance fee exists beyond the minimal camping fee if you stay overnight.
Hiking costs nothing beyond transportation to trailheads. The State Wildlife Area allows free day use for wildlife viewing and nature walks.
Fishing requires only a license. Colorado offers one-day licenses starting around $17 for residents and $21 for non-residents.
Camping vs. Hotels
Camping at the recreation site saves significant money compared to hotel stays. The camping fee is approximately $10 per night versus $80 to $140 for hotel rooms.
Bring your own camping gear if possible. Renting equipment adds unnecessary expense.
Food Costs
Preparing your own meals dramatically reduces costs. Pack a cooler with groceries from home or shop at markets in larger towns before reaching Kremmling.
Restaurant meals in Kremmling average $12 to $25 per person. Home-cooked campsite meals cost $5 to $8 per person.
Bring a camp stove or grill for cooking. Many established camping areas have fire rings for cooking over wood fires.
Timing Your Visit
Visit during shoulder seasons in May, June, or September. Accommodation prices drop compared to peak summer rates. The area is less crowded, making it easier to find good camping spots.
Weekday visits encounter fewer people than weekends. Monday through Thursday typically sees the lightest use.
Gas and Transportation
Fill your gas tank in larger cities before reaching Kremmling. Rural gas stations often charge premium prices.
Carpool with friends to split fuel costs. The remote location requires significant driving regardless of where you start.
Safety, Etiquette & Local Customs
Water Safety
Hot spring water is safe for soaking, but avoid submerging your head. Naturally occurring bacteria can cause infections if water enters your ears, nose, or eyes.
Do not drink the hot spring water. Bring plenty of fresh drinking water for your visit.
Test water temperature before fully immersing yourself. Some pools can be uncomfortably hot. Move to cooler areas if you feel dizzy or overheated.
Limit soaking sessions to 20-30 minutes. Exit the water, cool down, then return if desired.
Wildlife Safety
This is bear country. Store food properly in bear-proof containers or vehicles. Never leave food unattended at campsites.
Keep a clean camp. Dispose of trash properly in designated receptacles. If trash cans are full, pack trash out with you.
Observe wildlife from safe distances. Never approach or attempt to feed animals. Elk and moose can be dangerous if they feel threatened.
Leave No Trace Principles
The area struggles with trash left by inconsiderate visitors. Be part of the solution, not the problem.
Pack out everything you pack in. Leave campsites cleaner than you found them. Pick up any trash you encounter even if it is not yours.
Use existing fire rings rather than creating new ones. Fully extinguish fires before leaving or going to sleep.
Camp in established areas to minimize impact on vegetation. Avoid creating new camping spots in pristine areas.
Respect for Other Visitors
The hot springs can accommodate multiple groups, but courtesy makes everyone’s experience better.
Keep noise levels reasonable. Many people come here for peace and quiet. Loud music and shouting disturb the natural atmosphere.
Share the space. Do not monopolize the best pools. Allow others to enjoy the springs too.
Respect privacy. While the hot springs are clothing-optional for some visitors, be respectful of varying comfort levels.
Road Conditions and Vehicle Safety
Drive slowly on unpaved roads. Watch for oncoming traffic on narrow sections. Pull over to let faster vehicles pass.
Avoid driving at night on unfamiliar dirt roads. Wildlife is more active after dark, and poor visibility increases accident risk.
Visitor Comments About Radium Hot Springs
I.F., Iowa City: “We camped for three days along the river and absolutely loved it. The hot springs were perfect after long hikes during the day. The area felt wild and unspoiled. We saw deer and elk every morning. Be prepared for minimal facilities, but that is part of the charm. Bring everything you need and leave no trace. This place deserves to be protected.”
Y.F., Mitchell: “Radium Hot Springs exceeded our expectations. The drive was longer than anticipated, but worth every mile. Water temperature was ideal, and we had the pools mostly to ourselves on a Thursday in September. The fall colors were spectacular. Fishing was excellent too. My only complaint is some trash left by previous visitors. Please pack out your garbage, people.”
E.G., Visakhapatnam: “As someone visiting from overseas, this felt like the real American West. The natural setting was breathtaking. The hot springs provided such a unique experience compared to developed spas back home. I appreciated how free and accessible it was. Just be ready for rustic conditions and bring supplies. The remoteness is what makes it special.”
Additional Nearby Destinations
Radium Hot Springs works well as part of a longer Colorado adventure. Several notable destinations lie within a few hours drive.
Hot Sulphur Springs
Located 48 kilometers (30 miles) south, Hot Sulphur Springs offers a more developed hot spring resort experience. The facility includes multiple soaking pools, accommodations, and spa services.
Rocky Mountain National Park
About 113 kilometers (70 miles) southeast, this world-famous national park features alpine scenery, abundant wildlife, and hundreds of kilometers of hiking trails. Plan at least a full day to explore the park.
Steamboat Springs
Located 121 kilometers (75 miles) northwest, Steamboat is a renowned ski resort town. Summer offers mountain biking, hiking, and another set of hot springs at Strawberry Park.
State Forest State Park
About 80 kilometers (50 miles) north, this park protects pristine wilderness with moose viewing, backcountry camping, and alpine lakes. Less crowded than Rocky Mountain National Park.
Gore Pass
This scenic mountain pass lies 56 kilometers (35 miles) northwest. The summit offers spectacular views of the Gore Range. Wildflower displays peak in July.
Granby
About 64 kilometers (40 miles) south, Granby provides more services and lodging options. The town sits near Lake Granby, offering boating, fishing, and water sports.
Each of these destinations can be visited as day trips from a base camp at Radium Hot Springs. Alternatively, create a loop itinerary visiting multiple hot springs and mountain destinations across several days.
Practical Travel Tips
What to Bring
Successful visits require proper preparation. Pack these essentials:
- Swimsuit and towel for hot springs
- Water shoes or old sneakers for rocky pool bottoms
- Plenty of drinking water (at least 4 liters per person per day)
- Sunscreen and hat for sun protection at high elevation
- Insect repellent for mosquitoes near the river
- First aid kit including blister treatment
- Headlamp or flashlight with extra batteries
- Warm layers for evening temperature drops
- Rain jacket for afternoon thunderstorms
- Toilet paper and hand sanitizer
- Trash bags to pack out all waste
- Camp stove and cookware if staying overnight
- Bear-proof food storage containers
Cell Service and Communication
Expect no cell phone service in most of the Radium area. Download maps and important information before leaving areas with service.
Let someone know your plans before heading into the backcountry. Provide expected return times and contact authorities if you do not check in as planned.
Satellite communicators or emergency beacons provide peace of mind for solo travelers or those with medical concerns.
Weather Preparedness
Mountain weather changes rapidly. Morning sunshine can turn to afternoon thunderstorms within hours.
Lightning poses serious danger on exposed ridges and open areas. Seek shelter in vehicles or low-lying areas if storms develop.
Layer clothing to adjust for temperature changes throughout the day. Mornings start cold even in summer.
Altitude Considerations
At 2,073 meters (6,800 feet) elevation, some visitors experience mild altitude effects. Symptoms include headache, fatigue, and shortness of breath.
Stay well hydrated. Drink more water than you think you need. Avoid alcohol for the first day while acclimating.
Take activities slowly until your body adjusts. Most people acclimate within 24-48 hours.
Health and Medical
The nearest hospital is in Kremmling, about 24 kilometers (15 miles) away. For serious emergencies, medical helicopters can evacuate patients to larger facilities in Denver or Vail.
Bring personal medications and first aid supplies. No services exist at the hot springs themselves.
Treat or filter all water from natural sources before drinking. The river and springs are not safe to drink without purification.
Permits and Regulations
No permits are required for day use or camping at Radium Recreation Site. Pay the small overnight fee at the self-service station.
Follow all posted regulations regarding fires, camping, and resource protection. State Wildlife Area rules apply to the surrounding land.
Colorado fishing regulations require proper licensing. Special restrictions may apply to certain stretches of river. Check current regulations before fishing.
Your Adventure Awaits at Colorado’s Hidden Gem
Radium Hot Springs delivers an authentic wilderness experience that modern travelers increasingly seek. The combination of natural geothermal waters and pristine river scenery creates memories that last long after you return home.
This is not a manicured resort destination. The area rewards visitors who appreciate unspoiled nature and are willing to rough it a bit. Pack properly, respect the environment, and you will discover why people return to this special place year after year.
The warm springs bubbling along the Upper Colorado River have provided relaxation and renewal for centuries. Whether you come for a day trip or extend your stay to explore the surrounding wilderness, Radium Hot Springs offers something increasingly rare in our crowded world—a chance to disconnect from daily stress and reconnect with nature.
Start planning your visit today. The mountains, river, and warm springs are waiting to welcome you to one of Colorado’s most treasured hidden destinations.
