IRONMAN 70.3 Puerto PrincesaTraining Plan & Race Guide 2025
Puerto Princesa, PhilippinesMarch 2, 202570.3 mi — Half Distance2 min readPublished July 13, 2026
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01·Course Characteristics
Challenging the Princess of Ports
Surviving this tropical course requires absolute discipline, matching a calm, non-wetsuit harbor swim and a rolling, two-loop bike leg with a grueling, sun-baked run where extreme humidity and radiant heat dictate your final pace.
Climate
32°C
Peak air · water 27-29°C · high humidity
Conditions
Humid
Exposed run · >75% humidity · tropical wind
Elevation
636 m
Bike gain · rolling hills · steady climbs
Difficulty
8 / 10
Severe tropical heat, extremely high humidity, and a completely sun-exposed hilly run elevate the physical demand despite a calm harbor swim.
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A single-loop clockwise course in a highly protected harbor, offering exceptionally calm waters with minimal waves and minor currents. You will start and finish at the Baywalk Park boat ramp in warm, tropical conditions.
02
Bike
Two-Loop Coastal Expressway
Puerto Princesa to Iwahig
DISTANCE
90 km
LOOPS
2
ELEVATION
636 m
TERRAIN
Rolling
SURFACE
Concrete and asphalt
A newly redesigned two-loop course featuring a mix of flat, fast sections, rolling hills, and a few long, steady climbs. Navigating Roa Street, Malvar Road, and the Iwahig Bridge area, you will encounter minor road seams and tropical wind exposure.
03
Run
Mitra Sports Complex Finish
Coastal Roads to Ramon Mitra
DISTANCE
21.1 km
LOOPS
2
ELEVATION
157 m
SURFACE
Asphalt
SHADE
Very low
A grueling, two-loop coastal course that winds along the baywalk and city center before climbing to a stadium finish. This leg features virtually no shade, exposing you to direct sunlight, high humidity, and heavy radiant heat from the road.
03·AVG beginners' Training Timeline
From zero to the finish line
16 weeks
This 16-week progression is tailored to meet the extreme heat and rolling profile of Puerto Princesa. We begin with a solid aerobic foundation, transition to rolling strength, and conclude with a dedicated block focusing on heat acclimation and non-wetsuit swimming so you can finish strong.
Today · WK 0Race Day
WK 1–4
Aerobic Foundation
Build a strong aerobic engine and basic endurance across all three disciplines.
WK 5–8
Strength & Hill Prep
Introduce rolling hills on the bike and strength-focused run intervals to prep for the course terrain.
WK 9–13
Specific Build & Heat
Simulate race-pace efforts, non-wetsuit swims, and structured heat-tolerance sessions.
WK 14–16
Taper & Strategy
Reduce training volume to shed fatigue while maintaining intensity and practicing hydration execution.
Adapts to your fitness, schedule & recovery every week.
Expect morning temperatures around 24°C to 26°C, climbing rapidly to a midday peak of 32°C with humidity exceeding 75%. Dump ice and cold water over your head and torso at every single run aid station to keep your core temperature down.
Fuel & hydration
Plan for extreme sweat rates by targeting 500-1000mg of sodium per hour. Lean heavily on liquid or gel nutrition as solids will be very difficult to digest under intense tropical heat, and drink at every station.
Pacing
Ride conservatively on the first bike loop to save energy for the hilly run. Dial back your target run pace by 15-30 seconds per kilometer from the start to prevent early-onset cramping and cardiovascular drift.
Gear & logistics
Wear a high-performance swimskin instead of a wetsuit, and select heavily ventilated helmets and clothing. Arrive several days early via Puerto Princesa International Airport to acclimate to the intense humidity and utilize the on-site expo mechanics.
Frequently Asked Questions
What is the water temperature and wetsuit policy for the Century Tuna IRONMAN 70.3 Puerto Princesa swim?
The water temperature in Puerto Princesa is tropical, typically ranging from 27°C to 29°C (80°F to 84°F), which means the 1.9 km swim is strictly non-wetsuit legal. You can wear a swimskin for this single-loop, clockwise harbor swim starting at the Baywalk Park boat ramp. Because the waters are highly protected, you can expect calm conditions with minimal waves and very minor currents.
How hard is the Century Tuna IRONMAN 70.3 Puerto Princesa bike course?
The 90 km bike course is rated as hard, featuring a total elevation gain of approximately 2,089 feet (636 meters). Updated in 2025 to a faster two-loop layout, the course mixes rolling hills, long steady climbs, and flat sections on a combination of concrete and asphalt. You should prepare for tropical wind exposure on open sections and watch out for minor road seams.
What is the elevation gain and terrain for the IRONMAN 70.3 Puerto Princesa run course?
The 21.1 km run course is rolling to hilly with an elevation gain of approximately 517 feet (157 meters). It consists of a grueling two-loop route along coastal roads, the baywalk, and through the city center, finishing inside the Ramon Mitra Jr. Sports Complex. The course has very little shade, exposing you to direct, intense sunlight and high radiant heat from the asphalt.
What nutrition and hydration strategy should I use for IRONMAN 70.3 Puerto Princesa?
Due to extreme midday heat of up to 33°C (91°F) and humidity levels exceeding 75%, you should prioritize a high-sodium hydration plan targeting 500 to 1000 mg of sodium per hour. Favor liquid or gel nutrition over solid foods, which are harder to digest when your core temperature rises. Make sure to use every single aid station on the run for ice, cold water douses, and fluids to manage your core temperature.
What is the closest airport to the IRONMAN 70.3 Puerto Princesa race venue?
You should fly directly into Puerto Princesa International Airport (PPS), which is located very close to the city center and the transition area. From there, local beach resorts, hotels, and restaurants are just a short trike or taxi ride away. You will also have access to official bike mechanics at the race expo prior to race day.
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 Puerto Princesa— then adapts every week to how you actually perform.