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
DesignationReservoir
Total Wilderness Area440
Elevation / TerrainDiverse 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 60 miles.

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, Colorado
⌖ 6.17 miles
Gateway Basecamp

Boulder, Colorado

Experience the vibrant outdoor paradise of Boulder, CO, where the Flatirons provide a stunning backdrop for hiking, rock climbing, and mountain biking. An adventure lover’s dream town with urban charm.

Spring and Fall
Explore Town
Nederland, Colorado
⌖ 8.07 miles
Gateway Basecamp

Nederland, Colorado

Nederland, CO, is an adventure hub offering hiking, mountain biking, and snow sports with stunning alpine backdrops. Discover rugged trails, pristine fishing spots, and epic climbing routes in the heart of the Rockies.

Summer and Fall
Explore Town
Superior, Colorado
⌖ 10.20 miles
Gateway Basecamp

Superior, Colorado

Superior, Colorado is a friendly foothills town with easy access to fantastic hiking, biking, and climbing near the Rockies. Close to Boulder and Eldorado Canyon, it’s a great base for outdoor lovers seeking varied trails and open space adventures.

Spring through Fall for hiking and biking; Winter for snowshoeing
Explore Town
Ward, Colorado
⌖ 11.41 miles
Gateway Basecamp

Ward, Colorado

Ward, Colorado, is a small historic mountain town perfect for hikers, bikers, and anglers looking for peaceful alpine adventure. Surrounded by national forest and wilderness, it offers trails, fishing spots, and snowy winter treks away from the crowds.

Late Spring through Early Fall; Winter for snow activities
Explore Town
Louisville, Colorado
⌖ 12.20 miles
Gateway Basecamp

Louisville, Colorado

Louisville, Colorado is a lively town at the foothills of the Rockies offering excellent hiking, mountain biking, and paddling. With well-maintained trails, open spaces, and a welcoming community, it’s a great base for exploring Colorado’s outdoor playground year-round.

Spring through Fall
Explore Town
Black Hawk, Colorado
⌖ 12.65 miles
Gateway Basecamp

Black Hawk, Colorado

Black Hawk, CO is a historic mountain town offering access to hiking, biking, and winter sports in the Rocky Mountains foothills. Combine outdoor adventure with a vibrant gaming and historic district for a diverse trip experience.

Late Spring to Early Fall
Explore 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.

Red-Gold Ridges: Classic Climbs of Eldorado Canyon
ADVEXPEDITION
Colorado Springs, Colorado
ClimbingADV Bookable

Red-Gold Ridges: Classic Climbs of Eldorado Canyon

A full-day guided climbing experience in Colorado Springs that puts you on Eldorado’s storied routes—Swanson’s Arete, Yellow Spur, Rewritten and the demanding Naked Edge—useful for planning which classic to tackle.

ClimbingPT2HCertified Outfitter
Bookable OnlineBook Trip
Boulder Full Day Climbs
ADVEXPEDITION
Eldorado Springs, Colorado
ClimbingADV Bookable

Boulder Full Day Climbs

Climb iconic routes among Boulder’s legendary sandstone and granite with experienced guides. From Eldorado Canyon’s steep walls to the expansive Flatirons, discover Boulder’s diverse multipitch terrain with Colorado Climbing Company.

ClimbingAges 8+ • Up to 12 People • 8 HoursCertified Outfitter
From$289
Book Trip
Boulder Canyon: Full Day
ADVEXPEDITION
Boulder, Colorado
Guided TourADV Bookable

Boulder Canyon: Full Day

Tackle Boulder Canyon’s famed granite with Front Range Climbing Company, offering a full-day guided climb tailored to all skill levels. Experience hands-on instruction amid iconic Colorado vertical terrain just outside Boulder.

Guided Tour6 Hour • All Ages • All experience levelsCertified Outfitter
Bookable OnlineBook Trip
Flatiron Classic Climbs
ADVEXPEDITION
Boulder, Colorado
ClimbingADV Bookable

Flatiron Classic Climbs

Climb the legendary Flatirons with expert guides from Colorado Climbing Company, offering routes for beginners and seasoned climbers alike amid iconic Boulder sandstone formations.

ClimbingAges 8+ • Up to 3 People • 8 HoursCertified Outfitter
From$409
Book Trip
Tandem Paragliding Free Flight
ADVEXPEDITION
Boulder, Colorado
Air ActivitiesADV Bookable

Tandem Paragliding Free Flight

Take to the skies with Boulder Free Flight’s tandem paragliding for an unmatched aerial view of Colorado’s Front Range. Feel the lift and glide over Boulder’s iconic mountain landscapes.

Air ActivitiesCertified Outfitter
Bookable OnlineBook Trip
Decorative Additions 101
ADVEXPEDITION
Boulder, Colorado
WorkshopADV Bookable

Decorative Additions 101

Discover the art of stained glass with an immersive workshop at Colorado Glass Works. Learn unique techniques that turn ordinary pieces into eye-catching art and create your own stunning finished projects.

WorkshopLearn all About Adding Decorative Details • 2 hours • Skill FocusCertified Outfitter
From$135
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Framing 201
ADVEXPEDITION
Boulder, Colorado
WorkshopADV Bookable

Framing 201

Learn how to professionally frame your stained glass art in Boulder’s hands-on Framing 201 workshop. Perfect for beginners and intermediates, gain pro tips and refine your skills in just two hours.

WorkshopLearn How to Frame Your Stained Glass Art • 2 hours • Skill FocusCertified Outfitter
Bookable OnlineBook Trip
Soldering 101
ADVEXPEDITION
Boulder, Colorado
WorkshopADV Bookable

Soldering 101

Spend two immersive hours mastering soldering techniques for stained glass at Colorado Glass Works in Boulder. Perfect for makers ready to refine their craft with expert guidance and hands-on practice.

WorkshopMaster Your Soldering Skills • 2 hours • Skill FocusCertified Outfitter
From$135
Book Trip