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The Underground Circus 100

Smyrna, United States • 24 May 2025

The Underground Circus 100 is a versatile ultrarunning event held in Smyrna, Georgia, along the scenic Silver Comet Trail. Offering distances from 6 hours up to 100 miles, including timed events of 24, 48 hours, and various mile options, the course features a fast, relatively flat asphalt route with adjacent grassy trails through wooded areas. The out-and-back course spans 5 miles each way, with aid stations stocked with drinks and snacks.

The race welcomes first-time ultrarunners, emphasizing a no-DNF policy and flexible distance changes during the event. Located near Atlanta suburbs, the race combines a supportive small-town atmosphere with proximity to local attractions. Proceeds benefit the homeless. Visit the organization's website for the most recent information.

United States Georgia Smyrna

Race information

Registration Facebook
48 km
48hrs
24 km
24hr
100 mi
100 Miles
12 km
12hrs
50 mi
50 Miles
6 km
6hrs
40 mi
40 Miler
Visit the organization's website for the most recent information.
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