County Road 109 is a hiking, biking, and horse trail in Larimer County, Colorado. It is within Roosevelt National Forest. It is 1.7 miles long and begins at 8,256 feet altitude. Traveling the entire trail is 3.4 miles with a total elevation gain of 575 feet. The Glendevey Post Office (elevation 8,248 feet) post office can be seen along the trail.