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Did you know that Green Mountain Reservoir, with its 2,100+ surface acres (850+ hectares) of pristine water, produces some of Colorado’s largest rainbow and brown trout, with specimens reaching well into double-digit weights? This hidden gem, nestled along Highway 9 between Silverthorne and Kremmling, offers a perfect escape from the more crowded destinations in Summit County while delivering spectacular mountain views and abundant outdoor recreation opportunities.
Getting There & Planning Your Journey
Green Mountain Reservoir is conveniently located approximately 23 km (14 miles) north of Silverthorne and 19 km (12 miles) south of Kremmling along Highway 9. The reservoir stretches for several miles along this scenic route, offering multiple access points.
Closest Airports
- Eagle County Regional Airport (EGE) – 97 km (60 miles)
- Denver International Airport (DEN) – 145 km (90 miles)
If flying into Denver, rent a car and take I-70 west to Silverthorne, then head north on Highway 9. The drive from Denver takes approximately 2 hours, offering spectacular mountain scenery along the way. For those coming from the Eagle airport, take I-70 east to Silverthorne, then north on Highway 9.
Best Time to Visit & Weather Tips
Best Time to Visit Green Mountain Reservoir
| Season | Months | Activities | Conditions |
| Summer (Best) | June – August | Boating, fishing, camping, hiking | Warm days (21-27°C/70-80°F), cool nights |
| Fall | September – October | Fishing (kokanee run), photography | Cool days, cold nights, beautiful foliage |
| Winter | November – March | Ice fishing | Cold (-12 to 0°C/10-32°F), snow-covered |
| Spring | April – May | Fishing (after ice-out) | Variable, can be rainy/snowy |
The reservoir experiences afternoon thunderstorms during summer months, particularly in July and August. These storms can develop quickly, so morning activities are often more reliable. Fall brings spectacular colors and the kokanee salmon run, making October an excellent time for fishing enthusiasts and photographers.
Weather Tip: Mountain weather can change rapidly. Always bring layers, rain gear, and sun protection regardless of season. Afternoon thunderstorms are common in summer, so plan morning activities when possible.
Getting Around Locally
A personal vehicle is essential for exploring Green Mountain Reservoir and its surroundings. The reservoir stretches for 19 km (12 miles) along Highway 9, with multiple access points and campgrounds scattered around its perimeter.
Key Roads and Access Points
- Highway 9 – The main route running along the eastern shore
- Heeney Road – Follows the western shoreline, providing access to the town of Heeney and several campgrounds
- County Road 1725 – Leads to Lower Cataract Lake
- Black Creek Road – Access to Black Creek Reservoir
Most roads around the reservoir are well-maintained, though some campground access roads may be unpaved. Four-wheel drive is not necessary during summer months but can be helpful during spring and fall when conditions may be muddy.
Where to Stay
Camping Options
Green Mountain Reservoir offers several campgrounds managed by the US Forest Service. These sites are fairly primitive but provide stunning lake views and easy water access.
Reservable Campgrounds
- Cow Creek South – 40 sites
First-Come, First-Serve Campgrounds
- Prairie Point – 33 sites
- Willows – 35 sites
- Cataract Creek – 5 sites
- McDonald Flats – 13 sites
- Cow Creek North – 15 sites
- Elliot Creek – 15 sites
Camping Facilities: Most campgrounds offer vault toilets, picnic tables, and fire rings. There are no hookups or running water available. Camping fees range from $13-20 per night plus an additional fee for extra vehicles.
Campgrounds typically open in May and close in September or October, depending on weather conditions. Reservations for Cow Creek South can be made through recreation.gov.
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Nearby Accommodations
If camping isn’t your style, consider staying in nearby towns:
- Silverthorne/Dillon (23 km/14 miles south) – Offers hotels, motels, and vacation rentals
- Kremmling (19 km/12 miles north) – Features more affordable lodging options
- Heeney – Limited vacation rentals available around the reservoir
Dining & Local Cuisine
Dining options directly at Green Mountain Reservoir are limited, making it essential to plan ahead for meals.
At the Reservoir
- Heeney Marina – Offers basic snacks, drinks, and ice cream during summer months
- Master Bait & Tackle – A local bait shop/snack/liquor store on the west side of the lake (6875 Heeney Rd)
Nearby Options
For more substantial dining options, you’ll need to visit nearby towns:
- Kremmling (19 km/12 miles north) – Features several restaurants, cafes, and grocery stores
- Silverthorne (23 km/14 miles south) – Offers numerous dining options and large grocery stores for supplies
Local Tip: Stock up on groceries and supplies in Silverthorne or Kremmling before heading to the reservoir. Most campers bring coolers with food for their stay, as options at the reservoir are limited.
Attractions, Sightseeing & Activities
Boating
Green Mountain Reservoir is a popular boating destination with its expansive waters perfect for various watercraft.
- The reservoir permits all types of boating, including motorboats, jet skis, and sailboats
- Heeney Marina offers boat rentals during summer months
- There is one boat ramp available, which can get busy on summer weekends
- Be aware that afternoon winds can create choppy conditions
Fishing
Known for excellent fishing opportunities, Green Mountain Reservoir is home to rainbow trout, brown trout, and kokanee salmon.
- Shore fishing is popular along accessible banks
- Boat fishing allows access to deeper waters
- Ice fishing is available during winter months when the lake freezes
- Fall brings the kokanee salmon run, with October being prime time for big brown trout
- The Blue River below the dam offers catch-and-release fishing (artificial flies and lures only)
Hiking & Exploration
The area surrounding Green Mountain Reservoir offers several hiking opportunities:
- Lower Cataract Lake – A scenic 3.2 km (2-mile) loop trail leading to Cataract Falls
- Trails in the Eagles Nest Wilderness to the west of the reservoir
- Williams Peak Road and Elliott Ridge for more challenging hikes
Wildlife Viewing
The reservoir and surrounding wilderness areas provide excellent opportunities for wildlife observation:
- Birdwatching – Look for osprey, bald eagles, and various waterfowl
- Deer and elk are commonly spotted, especially at dawn and dusk
- Occasional moose sightings in wetland areas
Cultural Spots & Local Events
While Green Mountain Reservoir itself is primarily a natural recreation area, the surrounding communities offer cultural experiences and events:
Nearby Cultural Attractions
- Kremmling Heritage Museum – Learn about the area’s ranching and pioneering history
- Historic Downtown Kremmling – Features Western architecture and local shops
- Silverthorne Performing Arts Center – Hosts various performances and cultural events
Seasonal Events
- Kremmling Days (June) – Features a parade, rodeo, and community activities
- Blue River Festival (August) – Celebrates the Blue River with music and activities
- Silverthorne’s First Friday (Monthly, May-October) – Art walks and community gatherings
Nature & Outdoor Experiences
Green Mountain Reservoir offers spectacular natural beauty and diverse outdoor experiences throughout the year.
Scenic Beauty
The reservoir is surrounded by stunning mountain vistas that change with the seasons:
- Summer brings lush green hillsides and wildflower displays
- Fall transforms the landscape with golden aspens and dramatic colors
- Winter creates a serene snow-covered wonderland
- Spring features rushing waters and renewed vegetation
Stargazing
With minimal light pollution, Green Mountain Reservoir offers excellent stargazing opportunities:
- Clear mountain air provides exceptional visibility of stars and planets
- The Milky Way is often visible on moonless nights
- Summer evenings at the inlet are particularly good for combining sunset views with stargazing
Photography
Photographers will find endless opportunities around the reservoir:
- Dramatic sunrise and sunset reflections on the water
- Wildlife photography, especially birds of prey and waterfowl
- Landscape photography with mountain backdrops
- Night photography capturing stars and the Milky Way
Safety, Etiquette & Local Customs
Water Safety
- Always wear life jackets when boating or paddling
- Be aware of rapidly changing weather conditions that can create dangerous water situations
- The reservoir can experience strong afternoon winds – plan boating activities accordingly
- Water temperatures remain cold year-round – be prepared for cold water immersion
Outdoor Safety
- Altitude sickness can affect visitors – stay hydrated and pace yourself
- Wildlife encounters – maintain safe distances and never feed wild animals
- Fire safety – only use designated fire rings and fully extinguish all campfires
- Lightning safety – seek shelter during thunderstorms, which are common in summer afternoons
Important: Cell phone coverage can be spotty around the reservoir. Have a backup communication plan and let someone know your itinerary when exploring remote areas.
Environmental Etiquette
- Pack out all trash – there are limited waste facilities around the reservoir
- Stay on designated trails to prevent erosion and protect vegetation
- Respect quiet hours at campgrounds (typically 10 PM to 6 AM)
- Follow all fishing regulations, including proper licensing
Visitor Comments About Green Mountain Reservoir
“We discovered Green Mountain Reservoir last summer and were amazed by how uncrowded it was compared to other Summit County destinations. The fishing was exceptional – caught several nice rainbows trolling near the dam. The campgrounds are basic but the views make up for it!”
“Green Mountain Reservoir became our family’s favorite spot after we rented a pontoon boat from Heeney Marina. The kids loved swimming in the coves, and we enjoyed the peaceful setting away from the tourist crowds. Just be prepared for afternoon winds – mornings are definitely calmer.”
“As a photographer, I found Green Mountain Reservoir to be a hidden gem. The double rainbow I captured after a summer storm was breathtaking! The fall colors reflecting in the water were equally spectacular. Don’t miss sunset at the inlet – absolutely magical.”
Additional Nearby Destinations
While visiting Green Mountain Reservoir, consider exploring these nearby attractions:
Within 30 Minutes
- Lower Cataract Lake – A scenic alpine lake with a 3.2 km (2-mile) loop trail, located just 5 minutes west of Heeney
- Blue River – Excellent fly fishing below the dam
- Williams Fork Reservoir – Another fishing destination with less crowded waters
Within 1 Hour
- Lake Dillon – Larger reservoir with sailing and additional recreation
- Silverthorne/Dillon – Shopping, dining, and cultural attractions
- Hot Sulphur Springs – Natural hot springs for relaxation
- Breckenridge – Historic mining town with shopping and activities
Practical Travel Tips
What to Pack
- Layers of clothing – mountain temperatures can vary significantly throughout the day
- Sun protection – the high altitude intensifies UV exposure
- Rain gear – afternoon thunderstorms are common in summer
- Insect repellent – mosquitoes can be present, especially near shore
- Binoculars for wildlife viewing and stargazing
- Camping supplies if staying overnight
Permits and Passes
- Colorado fishing license required for anyone 16 or older
- Boat registration required for motorized watercraft
- Camping fees apply at all designated campgrounds
Local Services
- Heeney Marina: Boat rentals, basic supplies, and snacks (970-724-9441)
- Master Bait & Tackle: Fishing supplies, bait, snacks, and liquor
- Emergency Services: Call 911 (be aware of limited cell service)
- US Forest Service Dillon Ranger District: 970-468-5400 for current conditions and regulations
Your Mountain Reservoir Adventure Awaits
Green Mountain Reservoir offers a perfect blend of accessible recreation and natural beauty without the crowds found at more famous Colorado destinations. Whether you’re casting a line for trophy trout, exploring hidden coves by boat, camping under star-filled skies, or simply soaking in the spectacular mountain views, this hidden gem delivers authentic Colorado experiences that will call you back season after season. Pack your sense of adventure and discover why locals consider Green Mountain Reservoir one of Summit County’s best-kept secrets.
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