Froggy Hollow 5 & 9 presented by Altra
About this race
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.
Pick your distance
Running
9-Hour Challenge
9-Hour Relay Challenge
5-Hour Challenge
5-Hour Relay Challenge
"More Than a 4-Miler"
9-Hour Challenge
9-Hour Relay Challenge
5-Hour Challenge
5-Hour Relay Challenge
"More Than a 4-Miler"
Typical race-day weather
Based on 7 years of Open-Meteo archive data for this event's race dates in Clarksburg, plus the 3 days either side.
The sun rises at 6:59 AM and sets at 7:28 PM local time (EDT) in Clarksburg on March 28, 2026 — 12h 29m of daylight.
Course
No course map published yet.
The organizer hasn't released a route for this event, and we don't publish guesses. If you're the organizer, send us a GPX file and we'll draw the profile.
Reviews
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Results — Froggy Hollow 5 & 9 presented by Altra
Other races near Clarksburg
Different organizers, within 40 miles, in the next three months
Mustang Milestones 5K
MCRRC Black Hill 10K
Jingle Bell Run - Montgomery County, MD
Schaeffer Half Marathon, 10K, 5K Trail Run
🏃 Plan Your Next Race in Clarksburg
Find upcoming events by distance:
- Clarksburg Running Calendar 2026 4 races
Where this page comes from. Race details were last updated on . We re-check listings regularly and again in the week before race day.
- Entries, prices, waves and inclusions — the event's official registration page
- Temperature and humidity — Copernicus ERA5 reanalysis via Open-Meteo (CC BY 4.0)
- Elevation and terrain relief — Copernicus DEM GLO-90, ESA (CC BY 4.0)
- Comparisons and counts — Race Discovery calendar, 5 Clarksburg events
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