Jupiter Ridge Sand Spur

Jupiter Ridge Sand Spur is a winter ultramarathon in Jupiter, Florida, set in the Jupiter Ridge Natural Area, a protected coastal scrub dune site in Palm Beach County. The 9th edition offers Lunacy 30k Night Run (four 4.5-mile loops, about 18 miles with ~1,000 feet of dune climbing), Lunacy 50k (day half marathon plus 30k night, ~50k total), and Lunacy 50 Miler (day 50k plus night 30k, ~50 miles with ~3,000 feet gain). The OG 50k and Half Marathon return.

An 80-runner cap protects the habitat. Finisher medals, top awards with hourglasses, chip timing, aid stations, and drop bags complete the package. Visit the organization's website for the most recent information.