National Forest Development Road 506 is a hiking, biking, and horse trail in Skamania County, Washington. It is within Gifford Pinchot National Forest. It is 0.6 miles long and begins at 1,741 feet altitude. Traveling the entire trail is 1.2 miles with a total elevation gain of 212 feet. Along the trail there are adits.
Sign in/up to upload photos.