A single, counter-clockwise triangular loop held in the Indian Ocean. It takes place within the sheltered backwaters of the Colombo Port City breakwater, which blocks large ocean swells and currents, offering an exceptionally smooth, low-anxiety swim. Note that local marine wildlife safety precautions can occasionally impact this leg.
02
Bike
The Coastal Highway Time Trial
Colombo Port City to Parliament
DISTANCE
90 km
LOOPS
3 loops
ELEVATION
110 m
SURFACE
Smooth asphalt
WIND
Gusty crosswinds
A flat and fast three-loop route showcasing both modern and historic parts of the city on fully closed coastal highways. The road surface is high-quality tarmac built for speed, but you must negotiate technical city turns and gusty coastal crosswinds. Total elevation gain is minimal at just 110 meters.
03
Run
The Exposed Port Loop
Colombo Port City beachfront
DISTANCE
21.1 km
LOOPS
2 loops
ELEVATION
10-15 m
SHADE
Virtually none
PEAK TEMP
32°C
A flat, two-loop coastal route running directly along the ocean and beach, starting and finishing at Colombo Port City. While elevation is negligible, you will face extreme exposure to the midday sun with absolutely no shade. Heavy spectator support lines the course near the finish to keep your spirits high.
03·AVG beginners' Training Timeline
From zero to the finish line
16 weeks
This 16-week plan focuses on building the sustained aerodynamic endurance needed for a flat time-trial bike ride, followed by targeted heat preparation. Given the oppressive humidity and lack of shade in Colombo, the latter half of the program prioritizes hydration training and progressive thermal adaptation so your body can handle racing in the lower 30s Celsius.
Today · WK 0Race Day
WK 1–5
Base Build & Heat Prep
Establish a solid aerobic foundation across all three sports with low-intensity volume.
WK 6–10
Aerobic Strength & Aero Power
Build muscular endurance to hold a continuous aerodynamic position on flat terrain.
WK 11–14
Race Simulation & Thermal Stress
Execute race-pace brick workouts while practicing heat management and hydration protocols.
WK 15–16
Taper & Acclimatization
Reduce training volume while keeping intensity sharp, arriving early in Colombo to adapt.
Adapts to your fitness, schedule & recovery every week.
Expect intense tropical heat peaking above 30 degrees Celsius and humidity levels exceeding 75 percent. Use every aid station, spaced 1.5 to 2 kilometers apart on the run, to grab ice and cold water to douse your head and lower your core temperature.
Fuel & hydration
Aggressively pre-hydrate in the days leading up to the race and consume high levels of sodium and fluids on the bike. Stick to easily digestible liquid or gel carbohydrates because the extreme heat will slow your digestive system down.
Pacing
Do not let the flat bike course lure you into over-riding early on. Keep your power output highly conservative during the bike to preserve your legs and energy for the brutally hot, unshaded run.
Gear & logistics
Arrive 3 to 4 days early at the Shangri-La Colombo host hotel to acclimatize to the tropical climate. Opt for a deep-section front wheel instead of a full rear disc to handle the gusty coastal crosswinds, and wear a fast swimskin.
Frequently Asked Questions
What is the water temperature and wetsuit rule for the IRONMAN 70.3 Colombo swim?
The water temperature in the sheltered Colombo Port City breakwater averages 26°C to 27°C (78°F to 81°F), making the swim strictly non-wetsuit. Because of these warm tropical waters, you are highly encouraged to wear a swimskin instead of a traditional wetsuit. Note that the swim features a rolling beach start and follows a single, counter-clockwise triangular loop.
How hard is the IRONMAN 70.3 Colombo bike course?
Physically, the bike course is pan-flat and lightning-fast, with a minimal elevation gain of only 110 meters (360 feet) over 90 kilometers. However, the course is rated as moderate-to-hard because you must navigate technical city turns and battle strong, gusty coastal crosswinds. Lighter riders are cautioned against using a full rear disc wheel due to these windy coastal and city corridor sections.
What is the run course like for IRONMAN 70.3 Colombo?
The run is a flat, scenic 21.1-kilometer, 2-loop coastal route starting and finishing at Colombo Port City with less than 15 meters of total elevation gain. Despite being flat, it is highly challenging because it is completely exposed to the midday sun with virtually no shade. Temperatures on this run portion frequently rise past 30°C (86°F), making pacing and heat adaptation critical.
When should I arrive in Sri Lanka for IRONMAN 70.3 Colombo?
You should plan to arrive in Colombo 3 to 4 days before the race on February 22, 2026, to allow your body to adapt to the intense tropical heat and humidity. Flying into Bandaranaike International Airport (CMB) gives you easy access to the city, and staying at the official host hotel, the Shangri-La Colombo, will keep you right across from the transition area.
How should I plan my nutrition and hydration for IRONMAN 70.3 Colombo?
With race-day humidity exceeding 75-80% and temperatures reaching the low 30s°C (upper 80s to low 90s°F), you must aggressively pre-hydrate and consume high amounts of sodium and fluids on the bike. Focus on easily digestible carbohydrates like gels and liquids, as extreme core temperatures can slow down your digestion. Be sure to utilize the aid stations, which are spaced every 15 km on the bike and every 1.5 to 2 km on the run, for cold water, electrolytes, and ice.
Your Personalized Plan
Stop guessing your intervals. Train for this course.
FE26 builds your plan around your Strava data, your real schedule, and the exact demands of IRONMAN 70.3 Colombo— then adapts every week to how you actually perform.
