Experience the Half Iron Oceanside Triathlon in California: Endurance and Spectacular Views Await! Swim: Dive into the scenic Oceanside Harbor for a thrilling rolling start. Navigate the crystal-clear waters in a single counterclockwise loop, with an invigorating average water temperature of 61°F / 16°C to kickstart your race. Bike: Embark on an exhilarating cycling journey from Oceanside Harbor through iconic Camp Pendleton. Conquer San Mateo Hill and two other challenging climbs, followed ...