About This Park
Glacial River Mountain Bike Park is a Jefferson County pocket park off County Highway W near the Highway 26 overpass, built with the Jefferson County Bicycle Club. A green beginner loop mixes tight turns, small jumps, and a tabletop feature, while the blue intermediate line adds rollable jumps, narrow bridges, a snake feature, and roller sections. The trailhead sits along the paved Glacial River Trail with signage and a bike repair stand; parking is north along County W near the highway department depot. Riding is free, but the county asks riders to stay off the trails when they are damp.