Ironman 70.3 Oceanside

MAR

28

2026

The IRONMAN 70.3 Oceanside is a coastal triathlon starting with a harbor swim. The hilly bike course goes through Camp Pendleton military base, and the scenic run finishes on The Strand. It's known for its festive beach finish line.

Sat 28 Mar 2026

Oceanside, California

Website

Swim 1.2 Miles Run 13.1 Miles Bike 56 Miles

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Event Overview

The Athletic Brewing IRONMAN 70.3 Oceanside is a triathlon held in Oceanside, California. It is part of the IRONMAN 70.3 series, offering a mid-distance race.

Course Details

The course consists of three distinct segments over a total distance of 1.9 km swim, 90 km bike, and 21.1 km run.

Swim: The swim takes place in the sheltered harbor of Oceanside. The venue is described as having a relaxed beach atmosphere.

Bike: The bike course is classified as 'Hilly' and takes athletes through the active military base of Camp Pendleton.

Run: The run course is 'Rolling' and follows the Pacific Ocean coastline on beachfront trails. It finishes on The Strand with a festive atmosphere. This run course was voted the second-best IRONMAN 70.3 run course globally in 2023.

Event Information

The event is scheduled for March 28, 2026. Past conditions show an average water temperature of 14°C (57°F) and air temperatures ranging from 8°C (47°F) to 19°C (66°F). Visit the organization's website for the most recent information.

13 mi

Run 13.1 Miles

Swim 1.2 Miles

Bike 56 Miles