The Antelope Island Duathlon and Causeway Half Marathon, 10K, and 5K is a multisport and running event set in the scenic environment of Antelope Island State Park near Syracuse, Utah. Athletes take on a run-bike-run duathlon or choose from run-only events including a half marathon, 10K, and 5K.

Racing across the causeway and island landscape of the Great Salt Lake, participants experience one of Utah’s most distinctive venues for endurance sports, with bison, birdlife, and open horizons along the course. The event begins near 4528 West 1700 South, Syracuse.

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Most events return each year. Check the event website for current dates and times.