USFS 503 is the name of a defiant short mountain road located in Mineral County, in the U.S. state of Colorado. It’s one of the highest roads of Colorado.
Located in Rio Grande National Forest, the road is totally unpaved. It’s 833.35 m (2,734.08 ft) long, and tops out at 3.925m (12,877ft) above the sea level. Accessibility is largely limited to the summer season. It is not generally snow-free until late June or even July in some years.
4x4 vehicle with high clearance required. The road is steep. Starting from USFS 505 road, it is 833.35 m (2,734.08 ft) long. Over this distance the elevation gain is 105 meters. The average gradient is 12.6%.
Pic: Scotty Kindrick