The Underground Circus 100

Smyrna, United States • 24 May 2025

The Underground Circus 100 is an inclusive ultramarathon event taking place on the scenic Silver Comet Trail in Smyrna, GA. Participants can choose from various distances, including 100 miles, 50 miles, and shorter timed events, with a unique no DNF (Did Not Finish) policy that allows runners to switch distances during the race. The course features a flat, fast route surrounded by beautiful wooded areas, making it ideal for both first-time ultrarunners and seasoned athletes. Aid stations are well-stocked, and all proceeds support local homeless initiatives. Participants receive awards based on their distance, including customized buckles and finisher medals. Visit the organization's website for the most recent information.

Race information

48 hr
48hrs
24 hr
24hr
100 mi
100 Miles
12 hr
12hrs
50 mi
50 Miles
6 hr
6hrs
40 mi
40 Miler
Visit the organization's website for the most recent information.
Trail runs nearby

Loop The Hooch is a running event featuring a 50K, 25K, and a team relay race, taking place at Chattahoochee Pointe Park in Suwanee, Georgia. The course consists of a flat and fast 5-kilometer gravel/dirt loop along the scenic Chattahoochee River, making it ideal for both seasoned runners and beginn..

The Bronze Dragonfly 30 Hour Ultra is a unique running event taking place in Savannah, GA, designed to raise awareness for mental health issues. Participants can choose to run for 3, 6, 12, 24, or 30 hours on a certified 1.4-mile course that features a mix of paved and rubberized track. The event ho..

The Dirty Spokes Allatoona Creek Park Spring Trail Run offers two distance options: an 8.15-mile and a 3.85-mile course, set in the scenic Allatoona Creek Park in Acworth, Georgia. Participants will enjoy well-groomed trails surrounded by nature, providing a refreshing escape from urban life. The ev..

The Great Southern Endurance Run (GSER100) is an exciting 100K running event taking place in Marietta, GA. This unique point-to-point race offers participants a scenic tour of Atlanta, featuring notable landmarks such as Kennesaw Mountain, Braves Stadium, and Stone Mountain. Runners will experience..

Hot to Trot is an ultrarunning event taking place in Canton, Georgia, designed for those who embrace the challenge of running in hot and humid conditions. Participants can choose between two race options: a 4-hour or an 8-hour run, both on a flat, approximately 1-mile loop course at Boling Park. The..

The Red Top Roaster Trail Race, hosted by Dirty Spokes Productions, takes place at Red Top Mountain State Park in Cartersville, Georgia. This annual event features two race distances: an 8.85-mile and a 3.1-mile course, both showcasing the park's scenic trails. The race is capped at 325 participants..