Intermediate and Sprint Triathlon. Sign up today for the Brett Robinson Alabama Coastal Triathlon. The Triathlon begins early Saturday morning with a 1.5k swim in the Gulf of Mexico, a 40k bike ride through the state park and finishes with a 10k scenic run. The"Tri-it-on" Triathlon begins with a 300 yard swim, a 10 mile bike ride and a 2 mile run. Join us for the awards ceremony and post race party at The Hangout.