Jupiter Ridge Sand Spur
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Event details
The Jupiter Ridge Sand Spur is scheduled for Saturday, December 27, 2025 in Jupiter, Florida at 1800 South US Highway 1, within Jupiter Ridge Natural Area. Distances offered include:
- 50K
- Lunacy 50 Miler (day 50K plus 30k night run)
- Lunacy 50K (day half marathon plus 30k night run)
- Half Marathon
- Lunacy 30k Night Run
Entry is capped at 80 participants. The race is chip timed by A1/Trailhead Ultras. Registration closes on December 23, 2025.
Course and logistics
The course uses loops on the sugar sand dunes of Jupiter Ridge Natural Area. The 30k consists of four ~4.5 mile loops (about 18 miles) with roughly 1,000 feet of climbing; the 50K is described as about 2,000 feet of gain; the 50 miler is described as about 3,000 feet of gain; the half marathon about 800 feet. Runners will traverse ancient coastal scrub habitat protected by Palm Beach County, and the event is limited and managed to reduce environmental impact.
There will be two aid stations - at the start/finish and near the 2.25 mile mark of the loop - and a drop bag zone at the start/finish (one small duffle or tote allowed, labeled with bib number). Drop-downs on race day are not permitted; distance changes require joining a waitlist. Refund and credit terms are provided by the organizer, including a full refund minus fees through October 1 and other options thereafter. Visit the organization's website for the most recent information.