Logo

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.
Trail runs nearby

A Stroll in the Park - Canton, GA

Canton - 24 mi from Smyrna

A Stroll in the Park takes place at Boling Park in Canton, GA. The event offers 8- and 12-hour endurance runs on a roughly one-mile loop of crushed gravel with a grass shoulder, ideal for runners seeking a long training run or a personal best. The park provides toilets, shade, and ample parking, wit..

PCOS Trailblazers 5K

Lithia Springs - 10 mi from Smyrna

The PCOS Trailblazers 5K: Walk, Hike, or Run for PCOS Awareness takes place on September 28, 2025, in Lithia Springs, GA. The event is organized by PCOS Sisters Telehealth Clinic and PCOS Challenge during PCOS Awareness Month. It is an untimed, family-friendly event open to all ages and fitness lev..

Southside Scramble

Atlanta - 11 mi from Smyrna

Southside Scramble is Atlanta’s only intown trail race, held at Southside Park in southeast Atlanta (3460 Jonesboro Rd SE, 30354). The roughly 10-mile course winds through pine- and hardwood-shaded forests on looping singletrack, featuring roller-coaster descents, gravel stream crossings, powerline..

Chattahoochee Pointe Trail Run

Suwanee - 28 mi from Smyrna

The Chattahoochee Pointe Trail Run, organized by Dirty Spokes Productions, features two race options: a 6.2-mile and a 3.1-mile trail run, set in the scenic Chattahoochee Pointe Park in Suwanee, Georgia. This annual event, now in its seventh year, offers a beautiful off-road running experience with..

Brookhaven International Festival 5K

Atlanta - 11 mi from Smyrna

Brookhaven International Festival 5K Walk/Run takes place along the Peachtree Creek Greenway at the Briarwood Rd. Trailhead in Brookhaven, GA. The professionally timed USATF-certified 5K is open to runners and walkers, including strollers, children, and older participants, making it a family-friendl..

Battle at Big Creek

Roswell - 13 mi from Smyrna

The Battle at Big Creek is an annual trail running event hosted by Dirty Spokes Productions, taking place at Big Creek Trails in Roswell, Georgia. Participants can choose between two distances: 9.4 miles or 5.0 miles, offering a challenging course that includes a mix of single and double track trail..