IRONMAN 70.3 Muskoka

Huntsville, Canada · July · IRONMAN

IRONMAN 70.3 Muskoka: fairy lake, huntsville (swim venue)Photo is not from race dayMilan Suvajac, CC BY-SA 4.0
Fairy Lake, Huntsville (swim venue). Photo via Wikimedia Commons.

Why people love it

  • Lake of Bays bike views through Muskoka cottage country
  • Wetsuit-legal swim in Fairy Lake, typically 19 to 22 °C (66 to 72 °F)
  • Compact base at the Canada Summit Centre
  • Praised for organisers, volunteers and a welcoming town

Watch out for

  • Bike has over 1,100 m (3,600 ft) of climbing, with 29 short climbs up to 19.6%
  • Run starts on a very steep hill with little shade and broken pavement
  • Wave start swim with contact and sun glare when sighting
  • Hotels are limited and Toronto Pearson is about 215 km (134 mi) away

Race

3.5Very good

How racers feel about it, how well it is run, and how it treats a first timer. Counts for 27% of the overall score.

  • Racer satisfactionLoved3.9

    Recaps are positive about organisers, volunteers and the town, and one athlete loved the run despite calling it The Beast; few reviews. · Low confidence

  • OrganizationWell run4.0

    Well run per press and a 2022 athlete; the wave start felt chaotic and one narrow coned bike section was sketchy. · Medium confidence

  • First timer friendlyDemanding2.4

    Hilly bike with more than 1,100 m (3,600 ft) of climbing and a steep run; wave start contact. · Medium confidence

Course traits, not part of the score

  • PR potentialSlow2.1

    One site calls it the rolliest 70.3 bike; the run is steep, and the 2019 winner took about 4:02. · Medium confidence

  • Course easeVery tough1.8

    Steep hills on both bike and run, with little shade. · Medium confidence

Swim

4.3Very good

Wetsuit odds, water temperature, calm, and the experience of the start. Counts for 15% of the overall score.

  • Wetsuit legalAlmost always4.5

    Wetsuits were legal in 2017 to 2019 despite warm weather; typical water is 19 to 22 °C (66 to 72 °F). · Medium confidence

  • Water temperatureIdeal4.5

    Expected 19 to 22 °C (66 to 72 °F), averaging 20 °C (68 °F). · Medium confidence

  • Calm waterMostly calm4.0

    Calm in 2018; an inland lake with a sheltered channel. · Medium confidence

  • Swim easeEasy3.5

    Wave-start contact (one racer was kicked about five times in 2022) and sun glare when sighting. · Low confidence

  • Swim experienceGreat4.0

    Scenic Muskoka lake with wetsuit strippers. · Low confidence

Bike

3.5Very good

Road surface, closures, scenery and wind. Counts for 19% of the overall score.

  • Road surfaceMixed3.0

    Average overall, with some well-paved sections and some weathered rural roads. · Low confidence

  • Road closuresPartly closed3.2

    Riders are advised to keep to the shoulder on Highway 117; one narrow coned section. · Low confidence

  • Bike sceneryBeautiful4.4

    Views of Lake of Bays and forest in cottage country beside Algonquin. · Medium confidence

  • WindMostly calm4.0

    Forest shelters the rolling terrain; wind is not reported as an issue. · Low confidence

Course traits, not part of the score

  • Bike speedSlow2.2

    More than 1,100 m (3,600 ft) in 90 km (56 mi) with 29 short climbs up to 19.6%; one racer averaged 30.5 km (19 mi)/h (19 mph). · Medium confidence

  • Bike flatnessHilly2.4

    More than 1,100 m (3,600 ft) over 90 km (56 mi), and only about a third is flat. · Medium confidence

  • Bike simplicitySome technical parts2.5

    Constant ups and downs plus a narrow coned section near Bayville. · Low confidence

Run

2.3Below par

Crowds, aid stations, conditions underfoot and scenery. Counts for 13% of the overall score.

  • Crowd supportDecent3.0

    Spectators noted at the bike-to-run transition and finish; little else documented. · Low confidence

  • Aid stationsGood3.5

    Clif Bar, Gatorade and Red Bull were on course in 2017; little else documented. · Low confidence

  • Run sceneryBeautiful3.5

    Rural roads south of town through forest and countryside. · Low confidence

  • Run conditionsHard2.0

    Hills, very little sun protection and broken pavement with potholes. · Medium confidence

Course traits, not part of the score

  • Run flatnessHilly1.8

    Single loop with four demanding climbs, including 5% over 800 m (0.5 mi) after the turnaround. · Medium confidence

Conditions

3.9Very good

Air temperature, how predictable the weather is, setting, and spectating. Counts for 15% of the overall score.

  • Air temperaturePleasant3.8

    Highs on 18 July were 20 to 26 °C (68 to 79 °F) in 2022 to 2026; earlier years were hot and humid. · Medium confidence

  • Weather reliabilityVariable3.2

    Rain and thunderstorms appear in some forecasts, and past editions were hot and humid. · Low confidence

  • Venue beautyLovely4.4

    Muskoka cottage country with lakes and forest. · Medium confidence

  • Spectator friendlyEasy3.5

    Compact downtown base at the Canada Summit Centre, but the out-and-back bike limits viewing. · Low confidence

Course traits, not part of the score

  • Low altitudeLow4.0

    Huntsville is about 340 m (1,115 ft) above sea level. · Low confidence

Stay and travel

2.9Good

Hotels, walkability, getting there, and the town around the race. Counts for 11% of the overall score.

  • Hotel availabilityBook early2.8

    Popular summer cottage country with limited hotel stock. · Low confidence

  • Hotel valueNormal2.5

    Summer resort pricing is likely high. · Low confidence

  • WalkabilityWalkable3.8

    Race is based at the Canada Summit Centre near the Huntsville town centre. · Medium confidence

  • Travel easeOne connection2.8

    Toronto Pearson is the nearest major airport, about 215 km (134 mi) away. · Medium confidence

  • LogisticsSimple4.0

    Single downtown base with duathlon and relay options. · Low confidence

  • Town and foodGood3.7

    Town with family events, a pancake breakfast and Ironkids. · Low confidence

Key facts

Location
Huntsville, Ontario, Canada
Typical month
July
Latest or next date
18 July 2027
Organiser
IRONMAN
Field size
About 1,000 athletes
First held
2008
Distances
1.9 km (1.2 mi) swim, 90 km (56 mi) bike, 21.1 km (13.1 mi) run
Swim venue
Fairy Lake, Huntsville (Camp Kitchen Beach by Canada Summit Centre) (lake)
Water temperature
19–22 °C (66–72 °F)
Wetsuit
Legal
Swim start
wave
Swim laps
1
Bike climbing
1,100 m (3,610 ft)
Bike laps
1
Key climbs
29 short steep climbs, steepest 19.6%
Run laps
1
Run shade
Very little
Air temperature
7–26 °C (45–79 °F)
Humidity
Hot and humid some years
Altitude
340 m (1,120 ft)
Nearest airport
Toronto Pearson (YYZ), 215 km (134 mi) away
Where to stay
Huntsville downtown, Canada Summit Centre area
Booking
Summer cottage country; book early.

Official race website (ironman.com)

What racers and reviewers say

  • Sean Chin race reportRaced 2022 · blog · Positive

    Age-grouper's report: kicked several times in the wave swim and blinded by sun at a buoy, a hilly but scenic and shaded bike with one narrow coned section, and a run starting on a very steep hill that most walked. Calls the run The Beast, tougher than Tremblant, yet set a 12-minute PB.

    “The Beast”

    Sean Chin
  • Triathlon Magazine Canada 2019 recapRaced 2019 · article · Positive

    2019 recap: wetsuit-legal Fairy Lake swim, same out-and-back bike to Dorset, a brand-new hilly run, and much more favourable weather than previous hot, humid years (high teens to low 20s C / mid 60s to low 70s F). Age-group only; Cosman won in 4:01:42.

  • Triathlon Magazine Canada new run courseRaced 2019 · article · Mixed

    Details the single-loop run: climb out of the city centre, about 5 km (3.1 mi) of gradual uphill on Old Ferguson Road, a 5% climb over 800 m (0.5 mi) at about 11 km (6.8 mi), and a final climb. Warns of little sun cover and broken pavement.

    “four demanding climbs”

    Triathlon Magazine Canada
  • Triathlon Magazine Canada 2018 featureRaced 2018 · article · Positive

    2018 report of about 1,000 age-groupers: calm Fairy Lake swim, a 90 km (56 mi) out-and-back to Dorset with Lake of Bays views, two-loop run with lively spectators, and ideal cool, calm weather. Praises organizers, volunteers and town.

  • PJAMM Cycling bike reconRaced 2024 · article · Mixed

    Course recon calls it the rolliest 70.3 bike in the world: over 1,100 m (3,600 ft) on 90 km (56 mi), 29 short steep climbs peaking at 19.6%, only a third flat, average road quality.

    “the rolliest 70.3 bike in the world”

    PJAMM Cycling
Show 3 more
  • Triathlon Magazine Canada 2017 previewRaced 2017 · article · Mixed

    Preview describing the bike as one of the toughest in North America with endless hills in summer heat, a 19-22 C (66-72 F) wetsuit swim at Camp Kitchen Beach, no pro field, and family events including Ironkids and pancake breakfast.

  • Triathlon Magazine Canada race director interviewRaced 2019 · article · Positive

    Race director Nick Stoehr says the current Dorset out-and-back avoids the sharp steep climbs of the older Lake of Bays loop and that athletes liked the smoother pavement.

  • RaceRaves race pageRaced 2026 · aggregator · Mixed

    No athlete reviews. Average water 20 C (68 F), air high 23 C (73 F), Toronto Pearson nearest airport; July 18 highs 20-26 C (68-79 F) across 2022-2026.

Sources

Pages we used for facts and ratings. See how we rate.

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