Dunes 50K Ultra

Hobe Sound, United States • 25 Apr 2026

DTR Dunes Ultramarathon

The event takes place in Jonathan Dickinson State Park in Hobe Sound, Florida, on a property that covers about 11,000 acres. Courses run across a range of habitats and features inside the park.

Runners pass through pine flatwoods, river swamps and stands of bald cypress. Parts of the route cross an old military base and two named dune areas called Dunes of Heaven and Dunes of Hell. A notable section of the course goes through a sand scrub ecosystem made of rolling white sugar sand; this feature inspired the event name "Dunes."

Distances offered include:

  • 50 K Ultramarathon
  • Heavy Half Marathon : 13.1 Miles
  • Kids Run : 1 Mile

The description characterizes the terrain and landscape rather than race services or schedules. Information about entry, fees or exact race logistics is not included here. Visit the organization's website for the most recent information.

Race information

50 km
50k
14 mi
Heavy Half
Kids Free Fun Run
Visit the organization's website for the most recent information.
Trail runs nearby

A multi-format trail event on the sugar sand dunes of Jupiter Ridge, Florida, offering races from a single 3.3 mile loop up to a 102 mile ultramarathon. Courses use soft sand and short climbs and are run in hot, humid summer conditions.

Timed 12 hour and 50K ultraruns plus a shorter fun run on gravel loops along the Loxahatchee River in Riverbend Park, Jupiter. The event is self supported, offers awards for timed races, and directs proceeds to the local Florida Trail Assoc..

Looped trail race at the Oxbow Eco Center in Port St. Lucie on September 19, 2026, with timed 8k and 25k options. Proceeds support local environmental education programs; the marked course includes aid stations and start area facilities.

Experience a unique 10 mile night trail run through the forests of Jonathan Dickinson State Park. Navigate sand and dirt trails by headlamp and enjoy a festive Halloween atmosphere featuring a costume contest and post race celebration.

Add Event
Help us complete the calendar!
  • Distance is at least 5 km
  • Event has a website or Facebook page
Website
Optional: Please provide your e-mail address if we may contact you.
Report a change
We will only update the data if the information is also on the website.