St. Marks Duathlon
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Event overview
The St. Marks Duathlon is a multisport event held in St. Marks, Florida at 25 Riverside Drive. The race format is a run-bike-run with the following distances:
- 5K run (3.1 miles)
- 20K bike (12.4 miles)
- 2.5K run (1.6 miles)
The event is USA Triathlon sanctioned; participants must hold a USA Triathlon membership or purchase a one-day license. Proceeds support the Gulf Winds Triathletes.
Course, divisions and rules
Courses are marked with spray chalk arrows (5K red, bike yellow, 2.5K white). The course is open to traffic; athletes must follow traffic laws and the directions of volunteers and officers. One aid station with water is provided on the run courses (near the 2 mile mark on the 5K and before the first mile on the 2.5K). There are no aid stations on the bike course. Littering on-course is not allowed.
There are separate divisions including a Relay division (teams of 2 or 3, relay handoff from transition) and a Fat Tire division. Fat Tire criteria include knobby or heavily grooved tires at least 1.5 inches wide, handlebars and plugs configured for safety, and one working brake per wheel. Gravel bikes with appropriate tires are acceptable. All other USAT rules apply.
There is a 2-hour cut-off for an official finish time. The event has a no-refund policy and a $15 fee for any registration changes. Visit the organization's website for the most recent information.
