Riverbend Park Ultras

Riverbend Park Ultras take place in Jupiter, Florida, on September 12, 2026, with three trail formats: a 50K (31 miles), a 12-Hour timed race and a shorter Fun Run whose distance is not listed. Registration runs through UltraSignup, and the name places the event at Riverbend Park.

South Florida terrain is flat by nature, which makes this a rare chance to run a trail ultra where the challenge is heat and humidity rather than climbing. The 50K suits road marathoners looking for a first ultra without mountain-level technical demands, and the 12-hour lets you set a distance goal, whether that is a first 50K or a first 50 miles, and work toward it without a cutoff. Prepare with long runs in the warmest part of the day, a serious hydration and electrolyte plan, and a 12- to 16-week build focused on time on feet.