Grindstone 100

George Washington National Forest, Virginia, United States

104.2 miles (167.8 km) · 19,603 ft elevation gain · Loop · trail · Race

The Grindstone 100 is a 104.2 mile race in George Washington National Forest, Virginia, United States. The course features 19,603 feet of elevation gain and 19,642 feet of descent. The longest climb spans 23.9 miles with 2,546 feet of gain. Elevation gain averages 190 feet per mile. Approximately 63% of the route is runnable. The route follows trail surfaces. The course features very hilly terrain. The course difficulty of 13.7 puts it in the top 24.510000000000005% of challenging routes at this distance. This loop race attracts trail runners and hikers exploring Virginia's mountain terrain.