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    This reflects the 10Adventures difficulty rating for each route. We aim to keep ratings consistent across regions.
    This reflects the total elevation gained throughout this route as measured by the GPS file. This includes all ascents and descents, and is higher than what is quoted in most route guides, which simply measure the distance between the starting-point and high-point of the route.
    229 m
    This reflects the return distance of this route as measured by the GPS file.
    8.4 km
    This reflects the estimated time the majority of users will take on this trail. If you are slower, add time to the top-end figure. If you are fast, then you may complete this route faster than this time range.
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    Directions to Trailhead

    Gross Reservoir Hike


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    Table of contents

    The Gross Reservoir Hike is a lovely nature walk through the Roosevelt National Forest. This charming adventure will guide hikers along a shared route with OHV/Off roading vehicles; thus, the path is super easy to follow. Enjoy the sights of the surrounding Front Range mountains that flank the verdant woodlands as you trek to the glittering reservoir.

    Route Description for Gross Reservoir Hike

    The Gross Reservoir Hike is a charming nature walk through the Roosevelt National Forest. Enjoy epic sights of the Front Range snow-capped peaks that line the horizon as you trek along the meadow-cloaked route. Shared with off-roading vehicles, the trail is easy to follow, but often noisy. If you don’t mind the odd vehicle passing by then we can almost guarantee you will love this scenic adventure. Don’t worry though, there will be plenty of other hikers along the trail to socialize with! As you travel deeper into the wilderness, it is important to be mindful of wildlife—beware of mountain lions and bears in the area! There are plenty of warning posts along the trails to remind hikers, and we suggest wearing a bear bell to deter unwelcome visitors. Note: this route is only welcome to vehicles before the snow falls, so if you venture this route in the winter months you will be trekking in solitude—bonus!

    Don’t let the trail's name deter you, the Gross Reservoir Hike is an awesome adventure through the arid terrain of the Colorado wilderness. Offering activities for outdoor enthusiasts of all sorts, this versatile route can be driven, biked, hiked, snowshoed, or cross country skied. What more could you ask for? The lovely grassland trail dotted with pines will reward hikers with stunning views of the Front Range peaks and the Continental Divide all before delivering them to the glittering reservoir often littered with kayakers and canoers enjoying the waters.

    Lace up your hiking shoes and embark on your adventure along the Gross Reservoir Trail from the Winegar Ridge Trailhead. From here, track southeast along the WInegar Ridge Trail. If you are hiking, try to stay along the shoulder of the road. If you are driving the trail, we highly suggest a vehicle with 4x4 and high ground clearance. As you hike along the shared route, you will notice merging paths, ignore these routes, and continue along the Winegar Ridge Trail. Shortly after you depart from the trailhead, you will notice several designated dispersed campsites along the road. These are great places to set up shop for the night on your way back from the reservoir. Enjoy the sights of the towering pine trees and the vibrant wildflowers that dot the grasslands in the warmer months.

    Eventually, you will pass Dispersed Campsites 8 and 9, where you will be granted epic views of the Front Range foothills, like Twin Sisters Peak in the north. Revel in the scenery, and from this point forward, the path will begin to gradually descend towards the reservoir. As you hike down the path, sights of the shimmering waters of the Gross Reservoir will come into view. Remember to keep an eye out for wildlife as you trek! Soon you will encounter the trail’s end, from here, track FDR 359 down to the shores of the Gross Reservoir. Revel in the grandeur of the vegetation laden cliffs that hem the waters of the reservoir and notice canoers and paddleboarders enjoying the waters. If you venture this trail in the winter months, you will likely see ice fishing huts littering the ice surface.

    If you remembered to bring your fishing rod with you and you have a permit, then why not try your hand at some bass or trout? On lovely, summer days, we recommend having lunch along the shoreline of the Gross Reservoir. As you rest along the waters, appreciate the beauty of Colorado’s mountainous landscape. When you are done exploring the reservoir and you are rehydrated and recharged, simply retrace your footing along the path back to the trailhead.

    Trail Highlights

    Gross Reservoir

    Gross Reservoir is a large body of water that supplies much of the Denver area with drinking water. Completed in 1954, the reservoir serves as a storage and regulation facility for the waters that flow under the Continental Divide through the Moffat Tunnel. Often perceived as uninviting due to the name, the reservoir is actually beautiful. Named after Dwight D. Gross, former Denver Water Chief Engineer, the stunning reservoir not only serves an infrastructural purpose, but it’s a wonderful recreational area. Hike, bike, camp, kayak, fish or ice fish, the outdoor activities in this area are limitless!

    Frequently Asked Questions

    Can you swim in Gross Reservoir?

    No, swimming is prohibited in Gross Reservoir.

    Is kayaking permitted on Gross Reservoir?

    Yes, kayaking, paddle boarding, canoeing and other non-motorized boating is permitted on Gross Reservoir.

    Is fishing permitted in Gross Reservoir?

    Yes, assuming you have a valid Colorado fishing licence, fishing is permitted in Gross Reservoir.

    Getting to the Gross Reservoir Hike Trailhead

    The Gross Reservoir Hike departs from the Winegar Ridge Trailhead off Route 86J.

    Route Information

    • Backcountry Campground:

      Designated Backcountry Dispersed Campsites

    • When to do:


    • Pets allowed:

      Yes - On Leash

    • Family friendly:

      Older Children only

    • Route Signage:


    • Crowd Levels:


    • Route Type:

      Out and back

    Gross Reservoir Hike Elevation Graph

    Weather Forecast

    Check Area Weather


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