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Gross Reservoir wilderness guide
Reservoir · CO

Gross Reservoir

Gross Reservoir is a scenic body of water located in the foothills of the Colorado Rockies, offering a picturesque setting for outdoor activities such as fishing, kayaking, and hiking.

Reservoir4402+ Trails

Designation

Reservoir

Total Wilderness Area

440

Elevation / Terrain

Diverse Wilderness

Field Editorial Guide

About Gross Reservoir

Gross Reservoir is a scenic body of water located in the foothills of the Colorado Rockies, offering a picturesque setting for outdoor activities such as fishing, kayaking, and hiking.

Wilderness Landscape & Natural Heritage

Gross Reservoir, situated in Boulder County, Colorado, serves as a vital water storage and recreational site in the region. The reservoir is surrounded by the dramatic backdrop of the Colorado Rockies, offering expansive views and a tranquil atmosphere. Created by the construction of the Gross Dam on the South Boulder Creek, its primary function is to store water for the City of Denver, but it has become a popular destination for various outdoor activities. Boasting a rich natural environment, the reservoir is home to diverse fish species, making it an attractive spot for anglers. Additionally, it provides ample opportunities for paddling, as non-motorized boats are allowed on the serene waters. Hiking trails encircle the reservoir, leading through forests filled with native flora and providing potential wildlife sightings. The area is also conducive to picnicking and offers several vantage points where visitors can enjoy panoramic views of the reservoir and surrounding peaks. While Gross Reservoir does not feature developed campgrounds, its peaceful setting makes it ideal for a day trip or as part of a multi-day exploration of the nearby wilderness areas.

Field Guide · Reservoir
Adventure Destinations

Notable Destinations Near Gross Reservoir

Scenic viewpoints, outdoor landmarks, and notable points of interest within 30 miles.

Fishing at Gross Reservoir in Boulder★ 7.8⌖ 0 miFishing
Boulder

Fishing at Gross Reservoir in Boulder

Explore Gross Reservoir, located 15 miles from Boulder. Known for fishing, the reservoir offers peaceful surroundings and is easy to access by car. Best visited in spring and fall, this spot provides a serene escape with great photo opportunities, away from the crowds.

Walker Ranch Loop: Boulder’s Scenic Escape★ 7.8⌖ 1 miHiking
Walker Ranch Loop Trailhead Parking Lot

Walker Ranch Loop: Boulder’s Scenic Escape

Explore the 7.8-mile Walker Ranch Loop near Boulder, Colorado. Ideal for hiking, biking, and trail running, this loop offers stunning Rocky Mountain views and diverse ecosystems. Best experienced in spring and fall, the trail is moderately challenging with occasional wildlife sightings.

Walker Ranch Loop: A Scenic Escape in Boulder★ 8.0⌖ 1 miHiking
Walker Ranch Loop Trailhead

Walker Ranch Loop: A Scenic Escape in Boulder

Explore the Walker Ranch Loop, a 7.6-mile moderate trail near Boulder, CO. Enjoy diverse ecosystems, history, and wildlife. Perfect for hiking and birdwatching, with picnic spots nearby. Best visited in spring or fall for comfortable weather.

Eldorado Falls: A Hidden Gem in Boulder★ 6.8⌖ 2 miHiking
Eldorado Falls

Eldorado Falls: A Hidden Gem in Boulder

Eldorado Falls provides a moderate hike with scenic views near Boulder, CO. Enjoy rock climbing and picnicking by the falls. Expect to see wildlife like deer and eagles. Best visited from late spring to early fall.

Key Wilderness Highlights

✦ Spectacular views from the South Shore✦ Diverse fishing opportunities with species like rainbow trout and kokanee salmon✦ Kayaking and canoeing on the calm waters✦ Hiking trails that offer access to remote corners with rich wildlife
Wilderness Recreation

Outdoor Adventures in Gross Reservoir

Explore curated guides for top outdoor sports, trail networks, and wilderness activities.

Park Recreation

Hiking

Available in Gross Reservoir
Park Recreation

Wildlife Viewing

Available in Gross Reservoir
Park Recreation

Fishing

Available in Gross Reservoir
Park Recreation

Paddle Sports

Available in Gross Reservoir
Park Recreation

Photography

Available in Gross Reservoir
The Ranger Station

Visitor Logistics & Essential Planning

Everything you need to know about entrance passes, seasons, visitor centers, road transit, and wildlife safety in Gross Reservoir.

Passes & Fees

Entrance Requirements & Interagency Passes

No permits or fees required for access.

Wilderness Checklist

Carry paper topographic map & compass in remote zones.
Store all food and scented items in approved bear canisters.
Check wildfire / smoke advisories before backcountry departure.
Pack out everything you pack in (Leave No Trace).
Adventure Basecamps

Gateway Towns Near Gross Reservoir

Stay, dine, and gear up in these mountain towns and scenic basecamps surrounding the park.

Boulder
⌖ 6.17 miles
Gateway Basecamp

Boulder, Colorado

A vibrant outdoor hub offering a blend of thrilling mountain adventures and laid-back urban appeal, surrounded by the stunning Flatirons.

Spring and FallExplore Town
Nederland
⌖ 8.07 miles
Gateway Basecamp

Nederland, Colorado

A vibrant mountain town with easy access to the rugged beauty and outdoor activities of the Colorado Rockies.

Summer and FallExplore Town
Superior
⌖ 10.20 miles
Gateway Basecamp

Superior, Colorado

A welcoming Front Range town offering quick access to foothill hiking, mountain biking, and scenic outdoor escapes close to Boulder and Denver.

Spring through Fall for hiking and biking; Winter for snowshoeingExplore Town
Ward
⌖ 11.41 miles
Gateway Basecamp

Ward, Colorado

A historic mountain mining town offering rugged alpine adventures and serene wilderness experiences close to Boulder’s outdoors playground.

Late Spring through Early Fall; Winter for snow activitiesExplore Town
Louisville
⌖ 12.20 miles
Gateway Basecamp

Louisville, Colorado

A vibrant foothills town offering easy access to Rocky Mountain outdoor adventures with a friendly, active community vibe.

Spring through FallExplore Town
Black Hawk
⌖ 12.65 miles
Gateway Basecamp

Black Hawk, Colorado

A historic mining town turned gaming hotspot surrounded by Rocky Mountain foothills offering nearby outdoor adventures and scenic mountain landscapes.

Late Spring to Early FallExplore Town
Expert-Led Wilderness Expeditions

Guided Experiences in Gross Reservoir

Explore scenic backcountry routes and epic wilderness adventures with certified local mountain guides, naturalists, and outfitters.

12 bookable experiences

Availability, pricing, meeting details, and fulfillment are provided by the applicable operator or booking partner.