National Forest Development Road 4625 is a hiking, biking, and horse trail in Wallowa County, Oregon. It is within Wallowa-Whitman National Forest. It is 18.6 miles long and begins at 3,897 feet altitude. Traveling the entire trail is 37.3 miles with a total elevation gain of 3,242 feet. Lewis School (closed) (elevation 3,409 feet) and other schools can be seen along the trail.