Earl L. Main achieved the most remarkable individual athletic performance in Frederick County history, a once-in-a-lifetime accomplishment, by running 3,142 miles across the United States. He left San Francisco on Memorial Day in 1999, arrived in Ocean City, Maryland, on Labor Day by averaging over 30 miles a day for 99 consecutive days. He began his running career in the 1960s as a 400/800 meter competitor with two Frederick High School consecutive state championship teams. Main later ran 12 J.F.K. 50-mile runs. He served with the U.S. Marines in Vietnam. Main was known locally for his unselfish volunteerism in support of area youth programs.