The Chubb is the most challenging trail in the St. Louis area. It is a seven-mile dirt and gravel trail between West Tyson County Park and Lone Elk Park (14 miles round-trip). It has very challenging hills and some very fast stretches. Terrain is rocky and usually slippery. There are some truly nasty drop-offs. After those tough climbs you are often rewarded with great views.
The first four miles, starting at the Tyson Trailhead, are primarily steep climbs and descents. The middle three miles are flat, following the river bank (very much like Stinging Nettle Trail at Castlewood). A mile or so of uphill fire roads brings you to Lone Elk Park at the other end.
The eight-mile trail was developed by St. Louis County Department of Parks and Recreation and the Missouri Department of Natural Resources through the cooperative effort of the Meramec River Recreation Association, which is creating a 108-mile natural corridor along the Meramec by joining together parks and trails.