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Triathlon Atlas

Half distance · 18 July 2027

IRONMAN 70.3 Muskoka

Huntsville, 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
18 Jul 2027
Registration
Sold out
Swim venue
Lake
Average water temperature
20 °C
Bike profile
Rolling
Bike elevation gain
997 m
Run profile
Hilly
Run elevation gain
206 m
High air temperature
23 °C
Low air temperature
11 °C
Overall cut-off
8 h 30 min
Altitude
282 m
First edition
2008
Swim start
Rolling start

Edition history

20265 Jul 2026Held
20256 Jul 2025Held
20247 Jul 2024Held
20239 Jul 2023Held
202210 Jul 2022Held
202129 Aug 2021Held
20197 Jul 2019Held
20188 Jul 2018Held
20179 Jul 2017Held
201610 Jul 2016Held

How the day is laid out

The swim is held in a lake. An average of 20 °C sits in the range where a wetsuit is both allowed and worth wearing for nearly everyone.

The bike leg is labelled rolling.

The run is labelled hilly.

A rolling bike ahead of a hilly run leaves the climbing for last, when the legs have already done most of the day's work.

Expect air between 11 °C and 23 °C on race day. A spread of 12 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.

Against the calendar

Where this race sits among the others

Ranks are computed across every race of the same distance.

  • Average water temperature

    20 °C · median 21 °C

    The 43rd 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

    997 m · median 569 m

    The 18th hilliest of the 105 middle-distance races with a figure, across every circuit.

3

races of this distance pair a rolling bike with a hilly run, out of 159. 58 share the bike profile alone.

37

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

68

races are held in North America. 12 of them in the same month as this one.

Questions about this race

When is IRONMAN 70.3 Muskoka 2027?
IRONMAN 70.3 Muskoka is held on 18 July 2027 in Huntsville, Canada. The race is sold out.
Is a wetsuit allowed at IRONMAN 70.3 Muskoka?
Most likely. The average water temperature is 20 °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 Muskoka?
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 Muskoka?
The bike course climbs about 997 m, the 18th hilliest of 105 half-distance races with a figure. The bike is labelled rolling and the run hilly. 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: 16 Jul 2027 to 19 Jul 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