U.S. Olympian Jenny Simpson completes 7 marathons in 7 days

“I have never in my life been so happy to see a finish line,” Simpson wrote on Instagram

New Yorker sets 50K FKT around Manhattan

David Kilgore circumnavigated Manhattan in a little over three hours to beat the route record by 20 minutes

Florida man completes solo 100-mile charity run

David Kilgore ran 100 miles to raise money for small businesses and healthcare workers in New York City