The Underground Circus 100

Event overview

The Underground Circus 100 is an ultrarunning event in Smyrna, GA, held on the Kennesaw Mountain Trail near 4625 Camp Highland Rd SE. The event offers multiple distance and timed options:

• 100 Miles
• 50 Miles
• 24 hours
• 12 hours
• 6 hours

Organizers describe it as a no-DNF event where participants may change their distance during the race. Awards include a customized brass buckle for the 100-mile finisher, finisher awards for the 50-mile and shorter distances, and a certificate for every participant. All proceeds support work for people experiencing homelessness; organizers request donations such as socks, underwear, toothpaste, and toothbrushes.

Course, support and rules

The route is mixed terrain: trail with some rocks and roots, wooded sections, gravel road, and asphalt finishes. Parts of the course include relatively flat asphalt flanked by a grass trail. The trail remains open to the public; the event provides at least two aid stations, a timing mat, and lap sign-in. An indoor bathroom is available at a nearby Texaco and several convenience stores and restaurants are located about 8 miles out on the route. Volunteers staff aid stations and timing; volunteers who work an 8-hour shift receive race swag and free entry to the next year. The race director is on course during the event and has final authority on disqualification. Night running requires a headlamp or reflective gear. Wildlife may include deer and possibly snakes. No refunds; distance upgrades are allowed by paying the difference. Visit the organization's website for the most recent information.