# IRONMAN 70.3 Colombo — IRONMAN 70.3 race guide

> Course, typical race-day conditions and fueling for IRONMAN 70.3 Colombo, from metrica.fit. HTML version: https://www.metrica.fit/races/im703-colombo

- **Date:** Sunday 22 August 2027
- **Location:** Asia · 6.9355, 79.8487
- **Distance:** IRONMAN 70.3

## Key facts

- IRONMAN 70.3 Colombo is on Sunday 22 August 2027.
- It is an IRONMAN 70.3: 1.9 km sea swim, 90.6 km bike, 21.2 km run.
- Typically not wetsuit-legal: typical race-week water is 28.8 °C, above the 24.5 °C (76.1 °F) age-group limit. The official ruling is made on race morning.
- The 90.6 km bike climbs about 99 m in total (flat for a 70.3 bike).
- The 21.2 km run climbs about 45 m (flat).
- Typical race-day air temperature is 25–28.7 °C with a 5.2 m/s (19 km/h) wind from the SW (10-year climatology, not a forecast).
- For a typical ~5.5 h finish in hot conditions, plan about 90 g of carbohydrate, 1,000 mg of sodium and 825 ml of fluid per hour.
- Free 16-week training plan for this race (about 10 hours a week, starting Monday 2027-05-03): https://www.metrica.fit/races/im703-colombo/training-plan

## Course

| Leg | Distance | Elevation gain | Source |
| --- | --- | --- | --- |
| Swim (sea) | 1.9 km |  | course data |
| Bike | 90.6 km | 99 m (flat) | course data |
| Run | 21.2 km | 45 m (flat) | course data |

## Race-day notes

IRONMAN 70.3 Colombo is a fast, mostly flat day built around a 1.9 km sea swim, a 90.6 km flat/fast bike, and a 21.2 km flat/fast run—so staying smooth and ahead of the heat is the differentiator.

**Swim.** You’ll cover 1908 m in open sea at around 28.8°C, with conditions typically non-wetsuit depending on the official ruling set on race morning—confirm in the IRONMAN athlete guide. With typically warm air (25–28.7°C) you’ll likely feel better if you start controlled and avoid sprinting the first stretch; the goal is rhythm, not heroics. Expect light-to-moderate wind effects (SW winds at about 5.2 m/s) that can create surface chop—stay focused on straight swimming and don’t over-correct with every wave. Fueling during the swim isn’t usually practical; once you’re out, be ready to transition into planned hydration and carbs immediately for the bike. Finish the swim composed and focused on efficiency—survive the last stretches cleanly, then go straight into your bike routine without rushing your breathing.

**Bike.** Ride 90.6 km on a flat/fast course with only 99 m of total elevation gain, so speed will build quickly and overeating/overpacing is the main risk. With hot conditions (air 25–28.7°C) and SW wind around 5.2 m/s, treat the wind like a pacing tool: hold steady effort rather than reacting to gusts, and keep your bike handling smooth when the wind hits from the side. Your fueling target is 90 g carbs, 1000 mg sodium, and 800 ml fluid per hour—start early and aim for consistent intake through the ride, not just at the end. Drink steadily (don’t wait until you’re thirsty) and pair sodium with your fluid so you actually absorb and retain what you’re taking in. Because the bike is flat/fast, your job is to stay disciplined—hold smooth, repeatable power/effort and execute the full fueling plan while it’s still easy to digest.

**Run.** Run 21.2 km on a flat/fast course with 45 m of elevation gain, where heat management often matters more than terrain. With hot conditions (25–28.7°C) and a SW wind around 5.2 m/s, expect faster sections when you’re into/with the wind and more strain when it’s across your face—stay calm and keep effort even. Use the fueling from your planned intake strategy: keep sipping and eating regularly so you don’t fall behind once the pace feels tempting. If you start to overheat, shift to a slightly shorter stride and quicker turnover while you keep consuming—dehydration and sodium loss will show up as form breakdown and rising perceived effort. The run’s success is pacing plus hydration—keep effort controlled early, then let the flat course and your fueling carry you home.

**Weather.** Use consistent effort and steady intake: plan hydration and carbs from the start, make small technique adjustments for wind/chop, and avoid early surges on a flat course.

## Results by year

- 2026: https://www.metrica.fit/ironmanwc/2026-ironman-703-colombo (50 World Championship slots)

## Links

- Race guide (HTML): https://www.metrica.fit/races/im703-colombo
- Fuel plan for this race: https://www.metrica.fit/fuel?preset=im703&sport=tri&hours=5.5&intensity=race&race=im703-colombo&racename=IRONMAN+70.3+Colombo&carbs=90&sodium=1000&fluid=825&temp=29
- JSON: https://www.metrica.fit/api/public/races/im703-colombo
- Official race page: https://www.ironman.com/races/im703-colombo

Source: metrica.fit. Weather is a 10-year climatology (typical, not a forecast); course distances and climbing come from derived, approximate course tracks. Wetsuit rulings and cutoffs are set by the organiser — confirm in the official athlete guide. Not affiliated with the IRONMAN Group.