Froggy Hollow 5 & 9 presented by Altra

The Froggy Hollow 5 & 9 presented by Altra is an ultra trail event at Little Bennett Regional Park in Clarksburg, Maryland, on March 27, 2027. Participants choose among timed formats, including 5 hours, 5-hour relay, 9 hours and 9-hour relay, on a loop of about 4.3 miles (7 km). The 9-Hour Challenge starts at 6:00 a.m., the 5-Hour Challenge at 8:00 a.m. and the More Than a 4-Miler at 10:00 a.m.

A well-stocked aid station offers food and drinks. Some rules apply: no littering, and no pacers, crews, dogs, bandits or strollers. The Montgomery County parks authority reserves the right to cancel the event in extreme weather, as there is no rain date. The event is organized by Charm City Run Events and Altra.