We rate Oceanside the classic 70.3 season opener: a 1.9 km harbor swim, a 90 km bike climbing roughly 800 metres through Camp Pendleton, then a flat two-loop run on the strand. Early April on the SoCal coast stays dry and 11 to 19 degrees. The honest catch is the swim, a cold Pacific often near 16 degrees that shocks anyone who skipped cold-water training, and a roughly $425 entry that sells out fast.
Better info coming — we're still verifying 5 fields on this race.
Why we'd pick it
- 800 m of climbing: rolling, not pancake-flat.
- Open registration — no lottery to lose.
- A non-racing partner gets a real weekend here — 4/5.
- Race day usually sits 11–19°C, about 15% chance of rain.
The course
A 1.9 km swim in Oceanside Harbor, a 90 km single-loop bike that climbs through the US Marine base at Camp Pendleton over roughly 800 metres of gain (San Mateo and the climb riders nickname Hell Hill), then a flat two-loop 21.1 km run along the Oceanside strand. The honest catch is the cold Pacific swim, often near 16 degrees, which catches anyone who skipped cold-water practice; the bike tarmac is rough in spots too.
