The Dunes 50K Ultra & Heavy Half, set for Saturday, April 25, 2026, in Hobe Sound, Florida, promises an unforgettable adventure through the challenging landscape of Jonathan Dickinson State Park. This isn't your average trail run; it's renowned as one of Florida's toughest ultramarathons, pushing runners to their limits across 50K and a formidable Heavy Half (approximately 14.4 miles). Participants will traverse over 11,000 acres, journeying through 16 unique natural communities, including prairie wetlands, pine flatwoods, river swamps, and critical to its name, the infamous soft, rolling "sugar sand dunes," specifically the aptly named "Dunes of Heaven and Hell".

The course is predominantly 99% dirt trails, offering a grueling yet scenic experience with about 700 feet of elevation gain over the 50K distance, primarily due to the relentless sandy terrain. Runners consistently praise the race for its meticulously marked trails, ensuring no wrong turns through the diverse ecosystems. Typical race day conditions in late April see highs around 85°F and lows around 65°F, with a 13% chance of precipitation. To combat the warmth, the event is lauded for its "super well-organized" approach, including exceptionally supportive aid stations stocked with hydration, food, and crucial cooling sponges and ice, making runners feel like celebrities.

The Dunes 50K Ultra & Heavy Half has earned a reputation for being a "fantastic race in every aspect," with seasoned ultrarunners ranking it among their top experiences. Race directors Andre and Ludi of Down To Run are celebrated for their passion and commitment to creating a challenging yet safe and inspiring event. Spots for both distances are limited, reflecting its popularity and the intimate, well-managed atmosphere that defines this ultimate test of endurance in South Florida.