Dunes 50K Ultra

Hobe Sound, United States • 25 Apr 2026

Dunes 50K Ultra & Heavy Half

The event is held at Jonathan Dickinson State Park in Hobe Sound, FL, near 16450 S.E. Federal Highway. Distances offered include:

  • 50K
  • 13.1 (Heavy Half)
  • Kids FREE Fun Run

Courses traverse more than 11,000 acres and pass through 16 distinct natural communities. Terrain types named in the event description include prairie wetlands and areas referred to as the Dunes of Heaven and Hell. Several sections consist of soft, rolling sugar sand dunes that require sustained effort to cross.

The organizer states that spots are limited and that registration closes on Sat, Apr 25 at 11:59 PM ET. Event rules listed include no refunds and no transfers; vouchers will be honored until 3/27/25. The event information also references runner swag and an event schedule, and it lists the venue and general course characteristics. 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.