瀬戸内しまなみ海道 今治伯方島トライアスロン takes place on Sun, Oct 18, 2026 in Imabari, Japan. The main route is 51.5 km.
- Date
- Sun, Oct 18, 2026
- Start
- Imabari 🇯🇵
- Distance
- 51.5 km
- Level
- Open to all
Participants take on an Olympic-distance triathlon featuring a 1.5km swim in the Seto Inland Sea, a 40km bike course, and a 10km run on Hakata Island.
Official event pageWhat this race demands
This Olympic-distance triathlon demands a sustained, balanced effort across three distinct disciplines totaling 51.5 kilometers.
Multi-discipline endurance
Athletes must transition efficiently from a 1.5 km open-water swim in the Seto Inland Sea to a 40 km bike leg and finish with a 10 km run on Hakata Island without adequate recovery.
Pacing discipline
The standard Olympic distance requires a controlled effort to avoid accumulating excessive fatigue before the final 10 km running segment.
Aim for 60 to 90 grams of carbohydrates per hour during the bike and run segments to sustain energy output over the duration of the event.
Your road to race day
Race day at 瀬戸内しまなみ海道 今治伯方島トライアスロン is 8 weeks away. This is how a coach divides that time. The first phase starts now.
01Build2 weeks · Aug 24, 2026 – Sep 6, 2026
Progressive overload: training load climbs in waves, with harder weeks stacked on the base and planned recovery weeks that let the gains land.
02Peak3 weeks · Sep 7, 2026 – Sep 27, 2026
The hardest weeks of the plan: race-specific intensity at nearly full training load, sharpening exactly what this race asks for.
03Taper2 weeks · Sep 28, 2026 – Oct 11, 2026
Volume drops while intensity stays: short, sharp efforts keep the legs awake as fatigue drains away.
04Race week1 week · Oct 12, 2026 – Oct 18, 2026
Openers, rest and logistics. The work is done; the job now is arriving fresh.
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