Winiger Ridge (Gross Reservoir)

4.2/5 (17 reviews)
Boulder, Colorado (Boulder County)
Last Updated: 06/13/2022

Trail Information


Located 45 minutes southwest of Boulder, Winiger Ridge is the only 4wd road that allows access to the western side of Gross Reservoir. This easy trail is great for weekend camp trips with friends or day trips to the lake for some fishing, kayaking, or paddleboarding. Kick back, relax, and enjoy the scenery. Be aware that there is no swimming allowed in Gross Reservoir. This trail is a little rough but short and easy enough that any 4WD enthusiast can do it. Just be aware the trail could be crowded with other drivers and many hikers and is only a single car wide.

Trail Difficulty and Assessment

Trail Navigation

Trail Reviews

4.2/5 (17)
Visited: 10/15/2022
Difficulty Accuracy: Easier

pretty easy, came in from Boulder county road went to the lake then back out on this trail. Saw a Subaru on it so I would say not to rough however he would have had trouble in one spot if they didn't placed their wheels perfectly.
Visited: 07/17/2022
Difficulty Accuracy: Spot On

I got there a bit after 8A and there were already very few parking spots at the trail head. Just a note for hikers. The trail itself was fun for a newbie like myself and the OBW acquitted itself admirably. Nice combination of road surfaces and elevation changes. I was head-to-head only one time, and the pickup backed up as far as he could so I could climb onto the side of the hill for him to pass. Beautiful views from several places, lots of camping spots, some shelf road and some forest. All-in-all, a great place to learn the capability of the vehicle.
Rated 4/5
Visited: 06/05/2022
Difficulty Accuracy: Easier

I think I used 4wd twice, and I'm sure I could have made it without. Tight in places, so watch for traffic. Picked out a few future camping spots!
Seasonal Closure
Rated 4/5
Visited: 05/18/2022
Difficulty Accuracy: Spot On

Trail is still closed.
Official Crew
Visited: 05/15/2022

The Forest Service information gal told me the road opens on May 15th per the MVUM, but couldn't exactly confirm a ranger has gone out and opened the gate. She said snow pack was low along their roads so there shouldn't be any reason why they would have delayed this opening. Without a firsthand report, I will go ahead with what the FS says and list this as open for the season.

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