National Forest Development Road 622 Trail is a hiking, biking, and horse trail in White Pine County, Nevada. It is within Humboldt-Toiyabe National Forest. It is 1.2 miles long and begins at 7,285 feet altitude. Traveling the entire trail is 2.5 miles with a total elevation gain of 333 feet. The Shermantown Post Office (historical) (elevation 7,385 feet) post office can be seen along the trail.