Triathlon

Oslotri

Oslotri takes place on Sat, Aug 14, 2027 in Oslo, Norway. The main route is 51.5 km.

Oslo Triatlon is Norway's oldest triathlon, featuring swimming in Lake Sognsvann, cycling through the Maridalen valley, and running around Sognsvann.

What this race demands

Oslotri is a standard-distance triathlon requiring sustained aerobic output across three disciplines in the August climate of Oslo.

Multisport transition

The event requires executing and transitioning efficiently between swimming, cycling, and running over a 51.5 km total distance.

Aerobic endurance

Completing the continuous swim, bike, and run legs demands robust cardiovascular endurance suited for an effort lasting over two hours.

A target intake of 60 to 90 grams of carbohydrates per hour is recommended to sustain energy levels across the duration of the race.

Race day at Oslotri is 51 weeks away. This is how a coach divides that time. The first phase starts now.

01Base39 weeks · Aug 23, 2026 – May 22, 2027
Aerobic foundation: mostly steady endurance work that grows the aerobic engine and the durability the later phases stand on.
02Build6 weeks · May 23, 2027 – Jul 3, 2027
Progressive overload: training load climbs in waves, with harder weeks stacked on the base and planned recovery weeks that let the gains land.
03Peak3 weeks · Jul 4, 2027 – Jul 24, 2027
The hardest weeks of the plan: race-specific intensity at nearly full training load, sharpening exactly what this race asks for.
04Taper2 weeks · Jul 25, 2027 – Aug 7, 2027
Volume drops while intensity stays: short, sharp efforts keep the legs awake as fatigue drains away.
05Race week1 week · Aug 8, 2027 – Aug 14, 2027
Openers, rest and logistics. The work is done; the job now is arriving fresh.

Organising this race?