01·Course Characteristics
A tactical full-distance test demanding mastery over continuous highway undulations, potential ocean chop in the Tsugaru Strait, and a rolling run with localized hill climbs.
There's still hope!
The ideal build for this course is 24 weeks, and you have 8. We'll compress the essentials into your remaining time, prioritizing the demands that matter most on this course to get you to the finish line.
02·Course by Section
A two-loop ocean swim starting from a gently sloping shallow beach in the Bay of Hakodate. Expect potential ocean chop and currents within the Tsugaru Strait, which can make navigation and maintaining a straight line challenging.
A point-to-point connector from T1 leading into 2.75 loops on a fully closed, undulating expressway. This rolling profile features a steep, repeating climb near Moheji and exposure to crosswinds. Disc wheels are strictly prohibited on this course.
A three-loop course winding through the scenic, quiet countryside of Kikonai. While largely flat, each loop contains a notable hill climb and bridge crossing, totaling 200 meters of elevation gain under potentially humid late-summer conditions.
03·AVG beginners' Training Timeline
This 24-week progression systematically builds your base before shifting focus to the specific muscular demands of the repeating Moheji climb. As race day nears, you will simulate the warm, windy expressway conditions to ensure your pacing and nutrition strategies are bulletproof.
Aerobic Base & Swim Prep
Develop early aerobic volume and open-water comfort to prepare for the Tsugaru Strait swim.
Strength & Rolling Power
Build muscular endurance to handle the 1,450 m undulating climb and repeating Moheji incline.
Race-Specific Endurance
Simulate full-distance intensity, long-duration fuel testing, and back-to-back brick runs.
Taper & Sharpen
Reduce training volume to shed fatigue while executing short, high-intensity intervals to stay sharp.
Adapts to your fitness, schedule & recovery every week.
Personalize this timeline04·Race-Day Execution
Expect air temperatures peaking around 28°C with high humidity. Use the aid stations on the run loop for ice and cold water to actively lower core temperature on the unshaded expressway and countryside sections.
Target a high sodium intake to combat sweat losses in the humid 28°C heat. Aim for 80-100g of carbohydrates and 750-1000ml of fluid per hour, especially during the rolling bike leg where wind can mask dehydration.
Manage your power conservatively on the 2.75 expressway loops, avoiding excessive spikes on the repeating Moheji climb. Save energy for the three run loops, which feature late-stage hill climbs and bridge crossings.
Rent a vehicle to manage the split transition areas (T1 in Hokuto and T2 in Kikonai), which are situated far apart. Ensure you do not pack a disc wheel, as they are strictly banned on this expressway course.
The average water temperature in the Bay of Hakodate is around 70°F (21°C), which typically makes the swim wetsuit-friendly. Keep in mind that while the swim starts from a gently sloping, shallow beach, you should prepare for potential ocean chop, waves, and currents in the bay.
The bike course is moderate to difficult, featuring roughly 1,450 meters (4,750 feet) of total elevation gain across a rolling, continuously undulating profile. You will tackle 2.75 loops on the closed Hakodate-Esashi Expressway, which includes a particularly steep climb near Moheji that you must climb multiple times. Please note that disc wheels are strictly prohibited on this course due to potential crosswinds on the elevated highway.
The run is a 3-loop, 42.2 km course through the quiet countryside of Kikonai that finishes at the Kikonai Town Hall. While mostly flat, each loop contains a notable hill climb and a bridge crossing, accumulating about 200 meters (650 feet) of total elevation gain. The multi-loop setup is highly beneficial as it provides you with frequent access to aid stations.
Because this race uses a split-transition layout with T1 in Hokuto and T2 in Kikonai, renting a car is highly recommended as key areas and hotels are up to 30 to 60 km apart. You can fly into Hakodate Airport or take the Shinkansen bullet train from Tokyo directly to Shin-Hakodate-Hokuto Station, which takes approximately 4 hours.
You should prepare for warm and potentially humid late-summer conditions, with average air temperatures ranging from a low of 71°F (21°C) to a high of 82°F (28°C). Because the elevated expressway bike leg has limited shade and high wind exposure, prioritizing a high sodium and hydration strategy is critical to managing the heat.
Your Personalized Plan
FE26 builds your plan around your Strava data, your real schedule, and the exact demands of IRONMAN Japan South Hokkaido — then adapts every week to how you actually perform.
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