Dunes 50K Ultra
Hobe Sound, United States • 25 Apr 2026
Event
The Dunes 50K Ultra & Heavy Half takes place on Saturday, April 25, 2026, in Hobe Sound, FL. The event location is listed as 16450 S.E. Federal Highway at Jonathan Dickinson State Park. Registration is open and closes on April 25, 2026. Entry options include:
- 50K
- Half (listed as both 13.1 and 14.4 miles in materials)
- Kids Free Fun Run
The listing notes limited spots for the 50K and the Heavy Half. The event page states no refunds and no transfers; vouchers are honored until 3/27/25.
Course and terrain
The courses run inside Jonathan Dickinson State Park, covering more than 11,000 acres and passing through 16 different natural communities. Described terrain elements include prairie wetlands and soft, rolling sugar sand dunes, with named dune areas referenced as "Dunes of Heaven and Hell." The course length for the Heavy Half is described as 14.4 miles in one place and 13.1 miles in another; both figures are reported above. Visit the organization's website for the most recent information.