Grindstone 100

George Washington National Forest, Virginia, United States

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

Grindstone 100 is a 104.2-mile loop race in George Washington National Forest, Virginia, United States, gaining 19,603 feet of elevation. The race follows a up-and-over elevation profile. The terrain breaks into 19 distinct sections including 9 significant climbs. The longest climb covers 11.1 miles gaining 2,641 feet at an average 9.3% grade. About 63% of the terrain is runnable, with significant hiking sections. The race opens with a climb and finishes with flat terrain.