IRONMAN 70.3 Northern California

Arrive early enough to get calm in the water first, then do a brief warm-up (a few easy accelerations and some controlled breathing) so you’re not guessing your pace at the gun. Seed with the goal of clearing traffic quickly—if you’re faster, start up; if you’re consistent, stay where you can swim your line without constant passing. In the first minutes, settle into a smooth cadence, keep your start relaxed, and focus on sighting every few strokes so you don’t drift while others jostle around you.

You’ll cover 1854 m in freshwater where temperature varies, so your early effort should be based on comfort, not the clock. Expect that the pack energy can make you go out too hard—your job is to lock into steady breathing and a repeatable stroke rate until the mid-swim. With typical hot-day conditions, you’ll likely start feeling the pace sooner than you think; stay efficient to avoid burning matches before the bike. Fueling during the swim isn’t the goal—prioritize clean mechanics and then set up for an easy, organized transition.

Plan your T1 as a calm sequence: exit, stand and move to the bike area, remove any friction points (wetsuit if used, body glide if you use it), and transition into a smooth mount. Keep your first 2–5 minutes gentle—get your heart rate down from the swim and let your legs “find the pedals” before you add power. If you’re using your gear/positioning checklist, do it while you’re still coasting or at low intensity so you can ride focused once you’re up to pace.

Ride 90.7 km on a rolling course with 570 m of elevation gain, so expect repeated changes in effort on climbs and on the back sides of rollers. Use the terrain to stay steady: don’t sprint over crests, and don’t “coast hard” into every down; keep traction and stability and let your power smooth out. There’s a steady SW wind (about 4.1 m/s), so if you get a headwind or crosswind, treat it as a cue to hold form—shorter, firmer efforts on exposed segments and smoother pedaling in gustier moments. Fuel consistently to hit your target: aim for about 90 g carbs/hour, 1000 mg sodium/hour, and up to 800 ml fluid/hour—drink regularly, not just when you feel thirsty, and take in carbs in a rhythm you can sustain across the rollers.

In T2, get your first steps under control—your legs will feel heavier off the bike, especially on the first run-through flat sections. Do a quick, deliberate transition: tighten everything you’ll need immediately (shoes/gear), then start by running “slower than you feel you should” for the opening segment to prevent an early blow-up. Focus on smooth turnover and relaxed shoulders; hot conditions can sneak up fast once the bike work is over.

The run is 21.4 km and flat/fast with only 48 m elevation gain, so the main challenge is sustaining rhythm in hot conditions rather than fighting hills. Expect your pacing to feel easier than your effort—if the SW breeze is still present, it can add headwind discomfort on any exposed sections, so use breathing and cadence as your primary control knobs. Keep fueling steady through the run with your provided targets: about 90 g carbs/hour, 1000 mg sodium/hour, and up to 800 ml fluid/hour, adjusting intake based on how quickly you’re heating up. Small, frequent sips and consistent carb delivery tend to work best when conditions are hot—don’t wait until you feel “behind.”