Build your Oceanside 70.3 plan
Your coach opens with the Oceanside 70.3 set for April 3, 2027, asks about your week and your fitness, then writes every session of your 70.3 triathlon plan. Free, and you can start as a guest. About 21 weeks to go.
Start your Oceanside 70.3 plan- Formats
- 70.3
- Terrain
- Hilly
- Taper starts
- March 22, 2027
Oceanside 70.3 distances
- 70.3 1.2 mi swim, 56 mi bike, 13.1 mi run
Course
The Oceanside 70.3 course
The 1.2-mile swim is a single counterclockwise loop inside Oceanside Harbor, sheltered from ocean waves, with a rolling start. The 56-mile bike leaves the harbor and runs through Camp Pendleton, an active military base, and the site rates it hilly.
Read the full course notes
The 13.1-mile run is two loops from the harbor along The Strand and coastal neighborhoods, finishing near the Oceanside Pier.
- Terrain
- Hilly
- Formats
- 70.3
- Race-day conditions
- The official site lists an average water temperature of 61 °F (16 °C) and air temperatures from 45 °F to 69 °F.
What to train for
Train at sustained tempo effort on the bike and practice running off the bike in weekly bricks.
Rehearse fueling and pacing at goal intensity so the half marathon is run, not survived.
Include cold open-water swims and climbing on the bike, and practice the short climbs between beach and street level on the run.
Sample week
A sample Oceanside 70.3 training week
A week from the middle of the build, about six weeks out. Your plan sets the real distances and paces from your own fitness and adjusts them every week as you train.
- Monday
- Swim, 1 h: drills and technique
- Tuesday Key session
- Bike, 1 h 15 min with climbing repeats
- Wednesday
- Swim, 1 h: steady intervals at race effort
- Easy run, 50 min
- Thursday Key session
- Run, 50 min with tempo segments
- Friday
- Rest, or 20 minutes of mobility
- Saturday Key session
- Long ride, 3 h, then a 30 min run off the bike
- Sunday
- Long run, 1 h 30 min easy
Your build to race day
Taper
Tapering for the Oceanside 70.3
Start the taper ten to fourteen days before race day. Trim the volume in all three sports, keep short race-pace efforts in each, and do one last short brick so running off the bike still feels familiar. The course is hilly, so keep one short hill session in the first taper week to keep the climbs familiar. With the race on April 3, 2027, your taper starts around March 22, 2027.
Also in Claude
Ask Claude for this plan
Add Athlete Space to Claude once, then paste this prompt and put in your own numbers.
Build me a 70.3 triathlon season for the IRONMAN 70.3 Oceanside on April 3, 2027. I train about [hours] hours a week, [days] days a week.
Oceanside 70.3 training questions
How long should I train for the Oceanside 70.3?
Most athletes give a 70.3 triathlon sixteen to twenty weeks of focused training on top of an existing base. The coach counts back from your actual race date, so if you have less time than that it builds the best plan the remaining weeks allow rather than pretending you have longer.
What is the Oceanside 70.3 course like?
Hilly. The 1.2-mile swim is a single counterclockwise loop inside Oceanside Harbor, sheltered from ocean waves, with a rolling start.
How cold is the water at the Oceanside 70.3?
The official site lists an average water temperature of 61 °F (16 °C) and air temperatures from 45 °F to 69 °F.
When should I start tapering for the Oceanside 70.3?
Start the taper ten to fourteen days before race day. Trim the volume in all three sports, keep short race-pace efforts in each, and do one last short brick so running off the bike still feels familiar. The course is hilly, so keep one short hill session in the first taper week to keep the climbs familiar. With the race on April 3, 2027, your taper starts around March 22, 2027.
Do I need an account to get a Oceanside 70.3 training plan?
Start as a guest and save a free account later. Your coach writes your 70.3 triathlon plan and adapts it every week as you log your training. No card.