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Triathlon Atlas

Half distance · 20 June 2027

IRONMAN 70.3 Mont-Tremblant

Mont-Tremblant, Canada

The race at a glance

Official race website
Circuit
IRONMAN
Distance
Middle distance
Terrain
Road
Swim
1.9 km
Bike
90 km
Run
21.1 km
Date
20 Jun 2027
Registration
Sold out
Swim venue
Lake
Average water temperature
17 °C
Bike profile
Hilly
Bike elevation gain
694 m
Run profile
Rolling
Run elevation gain
231 m
High air temperature
23 °C
Low air temperature
12 °C
Overall cut-off
8 h 30 min
Altitude
227 m
First edition
2012
Swim start
Rolling start

Edition history

202621 Jun 2026Held
202522 Jun 2025Held
202423 Jun 2024Held
202320 Aug 2023Held
202226 Jun 2022Held
201923 Jun 2019Held
201824 Jun 2018Held
201725 Jun 2017Held
201626 Jun 2016Held

How the day is laid out

The swim is held in a lake, from a rolling start. An average of 17 °C sits in the range where a wetsuit is both allowed and worth wearing for nearly everyone.

The bike leg is labelled hilly.

The run is labelled rolling.

A hilly bike ahead of a rolling run puts the day's decision early: what you spend on the climbs is what the run will not have.

Expect air between 12 °C and 23 °C on race day. A spread of 11 degrees across the day matters as much as the peak, because what you wear at the swim exit is rarely what you want at the far end of the bike.

Lac Tremblant: 17 to 21 °C on race day

The race page gives an average water temperature of 17 °C, while the course page describes the lake as historically around 22 °C. The readings in its weather table fall in between: 21 °C in 2024, 17 °C in 2025 and 20 °C in 2026. The swim is a single loop with a rolling start.

Race-day air also varied: highs of 29 °C in 2024 and 19 °C in 2025. The bike leaves the resort on closed roads and returns to the start of the run. The run passes through the Old Village of Tremblant and uses the paved trail network, and the finish is in the village.

Source: ironman.com, read on 27 October 2026.

Against the calendar

Where this race sits among the others

Ranks are computed across every race of the same distance.

  • Average water temperature

    17 °C · median 21 °C

    The 8th coldest of the 128 middle-distance races with a figure, across every circuit.

  • High air temperature

    23 °C · median 25 °C

    The 43rd coolest of the 152 middle-distance races with a figure, across every circuit.

  • Bike elevation gain

    694 m · median 569 m

    The 44th hilliest of the 105 middle-distance races with a figure, across every circuit.

13

races of this distance pair a hilly bike with a rolling run, out of 159. 29 share the bike profile alone.

58

races across every distance fall in June, out of 354.

68

races are held in North America. 11 of them in the same month as this one.

Questions about this race

When is IRONMAN 70.3 Mont-Tremblant 2027?
IRONMAN 70.3 Mont-Tremblant is held on 20 June 2027 in Mont-Tremblant, Canada. The race is sold out.
Is a wetsuit allowed at IRONMAN 70.3 Mont-Tremblant?
Most likely. The average water temperature is 17 °C, below the 24.5 °C limit up to which wetsuits are allowed for age-group athletes. The official call is made on race morning.
What is the cut-off at IRONMAN 70.3 Mont-Tremblant?
The course closes 8 h 30 min after the start. Intermediate cut-offs after the swim and the bike are in the athlete guide.
How hard is IRONMAN 70.3 Mont-Tremblant?
The bike course climbs about 694 m, the 44th hilliest of 105 half-distance races with a figure. The bike is labelled hilly and the run rolling. Expect highs of about 23 °C on race day.

Where to stay

Hotels and rentals around the race venue, for the nights around race day.

Suggested stay: 18 Jun 2027 to 21 Jun 2027

The map is provided by Stay22. Bookings are made with the provider.

Races of the same distance in the same region

Entries are handled by the organiser

Registration and the athlete guide are on the official race page.

Open the official race page