Logo

The Dark Side 8 Hour Ultra

Clarksburg, United States • 7 Mar 2026

The Dark Side 8 Hour Ultra is an eight-hour trail race at Little Bennett Park in Montgomery County, Maryland, near Clarksburg. The course is a 5.5-mile loop run mostly on single-track trails, starting at the Little Bennett Campground Pavilion. Runners may complete as many laps as they wish within the 8-hour period, embracing a dark-side theme.

The event uses the same course as 2025. Aid stations provide water, hydration options, and ultrafare such as potatoes, broth, bacon, and French toast sticks, with muffins a favorite. A post-race veggie chili and taco bar are provided for finishers. Visit the organization's website for the most recent information.

United States Maryland Clarksburg

Race information

Registration Facebook
8 km
8 Hours
6 mi
5.5 Miles Loop
Visit the organization's website for the most recent information.
Trail runs nearby

St. Anselm's Family 5k

Northeast Washington - 28 mi from Clarksburg

St. Anselm's Family 5k is a family-friendly fundraising race in Washington, DC, held at 4501 South Dakota Ave NE. The event covers a 5k distance on a double-loop trail course, suitable for runners and walkers alike.It benefits a memorial scholarship fund at St. Anselm's Abbey School, supporting stud..

River's Edge Endurance Challenge

Brunswick - 19 mi from Clarksburg

River's Edge Endurance Challenge is a nonprofit running event held at Brunswick Middle School, Maryland. The lineup includes a 5K (3.1 miles), a 3-Hour Endurance Race, and a 6-Hour Endurance Challenge. The largely trail-based course runs on the River's Edge Trail System, with about a mile on school..

Fall Harvest 5k

Sterling - 18 mi from Clarksburg

The Fall Harvest 5k is a scenic trail race held at Claude Moore Park in Sterling, Virginia. Set amidst the vibrant colors of autumn, the course features forest paths and leaf-covered trails, offering a picturesque experience for both runners and walkers. This event is part of the Run Your PRCS Parks..

MoCo Dems 5K FunRun

Derwood - 10 mi from Clarksburg

MoCo Dems 5K Fall FunRun is a 5K run/walk at Agricultural History Farm Park in Derwood, MD. Organized by the Montgomery County District 15 Democratic Caucus, it offers a 5K for adults, a Youth 5K, and a free option for youth 10 and under. The course is a natural trail through the park, with water st..

Rick O'Donnell Memorial Ultra Challenge

Mount Airy - 11 mi from Clarksburg

The Rick O'Donnell Memorial 5 Mile Trail Run & Ultra Challenge takes place at Milkhouse Brewery at Stillpoint Farm in Mount Airy, Maryland. In its 13th year, the event offers three ways to test endurance: a single 5-mile trail loop, a 4-hour challenge, and an 8-hour ultra challenge. The hilly course..

The Westover 10k

Arlington - 26 mi from Clarksburg

The Westover 5k & 10k is a flat, scenic race at Bluemont Park in Arlington, Virginia, along the W&OD Trail. The course is an out-and-back, with the 10k running out-and-back twice. The event is part of Bishop’s Events’ Year-Long 5k/10k/Back of the Pack Series and Fall Series.Walkers and strollers are..