2 running events in Clarksburg, Maryland

Set in scenic Little Bennett Regional Park, the Froggy Hollow 5 & 9 presented by Altra is a timed trail ultra event with 5-Hour, 5-Hour Relay, 9-Hour, 9-Hour Relay, and "More Than a 4-Miler" options. This trail race offers the perfect setting for new and veteran trail runners to push their limits and achieve their new personal best. All participants will complete the 4.4-mile loop through Little Bennett Regional Park in Clarksburg, MD. We’ll have a fully stocked aid station on the course with a variety of food and hydration options.

We hope you will join us for this trail ultra brought to you by Charm City Run Events and Altra!

Not permitted on the trail: littering, pacers, crew, dogs, bandits, strollers.

Montgomery County Parks MNCPPC has the ultimate say over our event. In the event of extreme weather, the County can/will pull our event permit causing us to cancel the in-person event. Please read our entire weather policy for more information and details. Please note: THE 2026 RACE DOES NOT HAVE A RAIN DATE.

On Saturday, April 18, 2026 the 18th annual Clarksburg 5k Run, 5k Walk, and Kids Fun Run, presented by Cedarbrook Community Church, will kick out of the starting gate in what promises to be an exciting and fun filled event. The day's events will include a 3.1 mile run, 3.1 mile walk and a Kid’s Fun Run. The race ends at a festive area where participants will find prizes, food and beverages, music, and a children’s play area. More information about the race can be found at the race website – www.clarksburg5k.com. The Clarksburg 5k will incorporate good old-fashioned family participation with a healthy dose of fun. Everyone in the Upcounty area can join together to feel good and to do good. Now in our 18th year, the Clarksburg 5k has become a signature event in upper Montgomery County. Each year the event supports organizations that provide benefits for our community.