National Forest Development Road 440 is a hiking, biking, and horse trail in Nye County, Nevada. It is within Humboldt-Toiyabe National Forest. It is 16.2 miles long and begins at 7,773 feet altitude. Traveling the entire trail is 32.6 miles with a total elevation gain of 4,863 feet. The Barcelona Mine (elevation 8,950 feet) quarry can be seen along the trail.