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Oceanside 70.3

Oceanside, CA · USA · March / April · 70.3

A cold-water season opener: the swim and chilly bike start define your day.

🏊 Swim

1.9 km

Cold harbour swim — wetsuit almost certain.

Strategy: Cold water spikes your breathing for the first 200m. Warm up, start controlled, and do not panic when the cold hits.

🚴 Bike

90 km · 700 m ↑

Rolling Camp Pendleton roads with a couple of stinging climbs.

Strategy: You start the bike cold and stiff — ease into the first 20 minutes, then settle. Save matches for the back-half climbs.

🏃 Run

21.1 km

Flat, fast, two laps by the water.

Strategy: A genuinely fast run if you paced the bike. Negative-split it; the flat course rewards discipline.

Course & conditions

Bike climbing
700 m
Likely temp
16°C
Water
14–16°C
Wetsuit: likely legal / recommended
Climate: Early-season and cool — cold water is the headline.

Cutoffs

GateCutoff (from your start)
Swim — out of the water1:10:00
Off the bike5:30:00
Overall finish8:30:00
Template cutoffs updated 2026-06-22 basis: rolling Official Athlete Guide ↗

Standard 70.3 cutoff structure shown as a planning template — most 70.3s allow ~8:30 overall from your rolling start, with a swim cutoff near 1:10 and a bike cutoff near 5:30. Mid-bike and mid-run cutoffs vary. Always confirm the exact gates and clock basis in this event’s Athlete Guide for your race year.

Targets by level

Finish-first

Beat every cutoff with margin. Swim relaxed, ride well within yourself, walk-run the climbs, and never stop fuelling.

Sub-6 / strong age-grouper

Hold steady race power on the bike, protect the run, and execute transitions cleanly. The run is won by what you did NOT do on the bike.

Competitive age-group

Sharp swim, disciplined high-end bike to your durability, and a negative-split run. Every transition second counts.

First-timer risks

  • Cold-water shock at the start — practise cold swims beforehand.
  • Starting the bike too hard while still cold and tightening up.

Packing & prep

  • Wetsuit plus neoprene cap/booties if you run cold.
  • Arm warmers for the early bike.

Race-morning timeline

−3:00 h Wake, main breakfast, sip fluid. Familiar food only.
−1:30 h Arrive, body-mark, set up transition, pump tyres, rack bike.
−1:00 h Top-up carbs + fluid. Wetsuit half-on, short warm-up.
−15 min Optional gel, get to the swim corral, find your seed pace group.
Gun Start controlled — the first 300 m of the swim is not the race.

A generic template — adjust to the event’s actual transition close and start times in the Athlete Guide.

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