Triatlón de Mutriku is a sprint triathlon held at the beach in Mutriku, on the Gipuzkoa coast of the Basque Country. Typically scheduled for late May, it follows the standard three-part format: 750 meters swimming, 18.5 kilometers cycling, and 5 kilometers running. Talaixa Triatloi Kluba and the local council organize the event, with guidance from the Basque and Gipuzkoa federations.
The participant limit is 250 athletes, and recent events have seen over 150 participants. The race is open to individuals aged 16 and older, employs chip timing, and mandates a helmet and a road bike in good working order. The cycling route may differ from the standard course, so it is advisable to verify this detail before race day. The event is part of a series of Gipuzkoa triathlons, including Getaria, Zarautz, Donostia, and Zumaia, contributing to a concentrated coastal racing schedule rather than being a singular destination event.