About This Race
The Delirium Ultra stands as one of South Carolina's most distinctive endurance challenges, where runners test their limits against time rather than distance. Set on the picturesque Lady's Island near Beaufort, this 14-year-old event offers three distinct challenges: 6, 12, and 24-hour races on a 1.65-mile hard-packed trail loop. The race celebrates both endurance and community spirit, encouraging Halloween costumes while providing comprehensive aid station support throughout the event. What sets Delirium apart is its emphasis on sustainability and runner experience. The event has partnered with Hydrapak as their sustainable racing partner, eliminating disposable cups and providing reusable speed cups to all participants. The single aid station becomes a hub of activity, offering everything from traditional ultra fare to hot meals served at specific times throughout the race. The event's cosmic Halloween theme adds a unique character to the proceedings, while the loop format allows for easy crew access and gear management in "Tent City." Runners can camp on-site from Friday through Sunday, creating a festival atmosphere that extends beyond the racing itself. With over a decade of refinement, Delirium Ultra has evolved into a well-organized event that balances serious endurance racing with community celebration.
The course consists of a 1.65-mile loop on hard-packed trail surfaces on Lady's Island, South Carolina. Runners pass the single aid station at the completion of each lap, making pacing and nutrition management straightforward. The loop format allows for easy access to personal gear and crew support throughout the event.
The terrain is described as hard-packed trail, suggesting a relatively runnable surface without significant technical challenges. The flat coastal geography of the area indicates minimal elevation change, making this primarily a test of endurance rather than technical trail running skills.
Aid Stations
1 stations along the course
Main Aid Station
water, electrolyte, soft drinks, oranges, bananas, sweet snacks, salty snacks, soup, hot meals
Single aid station passed at completion of each 1.65-mile lap. Hot meals served at scheduled times: 11am sandwiches, 4pm burgers, 9pm pizza.
Race History
2025 Results
Practical Info
Late October in coastal South Carolina typically features mild temperatures with highs in the 70s and lows in the 50s, with moderate humidity and potential for light rain.
CHS - Charleston International Airport
On-site primitive camping is available Friday through Sunday. No open fires permitted in tent city area.
- Reusable water bottle or cup
Best For
Notable Features
Delirium Ultra distinguishes itself through its comprehensive aid station support, sustainable practices, and festival atmosphere. The single aid station serves hot meals at scheduled times throughout the event, including grilled cheese sandwiches, hamburgers, pizza, and various other hot foods. The race's partnership with Hydrapak emphasizes environmental responsibility while the Halloween theme and on-site camping create a unique community experience that extends beyond the racing itself.