The Underground Circus 100
Smyrna, United States • 4 Jul 2026
The Underground Circus 100
The event in Smyrna, GA, takes place on the Silver Comet Trail and offers multiple timed distances. Distances listed by the organizer include:
- 100 Miles
- 50 Miles
- 24 Hour
- 24 Hour Relay
- 12 Hours
- 6 Hours
The route is primarily asphalt and grass with about 125 feet of elevation. The course is run as a straight out and back: a 10 mile outbound leg with one street crossing, then 10 miles back, with timing mats and volunteer sign-in for each lap. The trail is open to the public and volunteers staff aid stations. One bathroom is available 24 hours and another is available past mile 5 until 7:00 PM. Overnight parking is available in the lot and at nearby 24 hour businesses; there are no electric outlets for campers or RVs.
Aid stations are described as fully stocked with drinks, snacks and hot food options. The organizer notes that participants with restricted diets should bring personal food. Night running requires a headlamp or reflective gear. Littering is prohibited and may lead to bans. The event has a full 40 hour clock for long distances and allows movement between distances during the event by paying any price differences. Awards include a customized brass buckle for the 100 mile finishers, finisher awards for 50 miles and shorter distances, and race swag. Proceeds support services for people experiencing homelessness; donations of basic items are accepted. Visit the organization's website for the most recent information.