Subaru Guelph Lake Triathlon (Guelph Lake 1 and 2)
Guelph, Canada · June · Independent (Subaru Triathlon Series, TriSport Canada)
Course: 0.8 km (0.5 mi) swim, 19 km (11.8 mi) bike, 5 km (3.1 mi) run. 750 m (0.47 mi), 19 km (11.8 mi), 5 km (3.1 mi) per the 2026 organiser page (Guelph Lake 2 sprint is 29 km / 7 km).
Why people love it
- Sprint swim is one beach-start loop with interval waves to spread the field.
- Rolling out-and-back bike, called fast by the organiser; Olympic bike is 36 km (22.4 mi).
- Run stays inside the park on flat paved roads with short rolls.
- Kit pickup on race morning: 6:30 to 7:45 AM Saturday, 7:15 to 8:45 AM Sunday.
- Athletes enter the park free; spectators pay $8.50 per adult.
Watch out for
- A rider was hit by a driver on the 2018 bike course; current closure status is not stated.
- Open, exposed bike roads make wind a factor; speed bumps at the park gate can eject bottles.
- Long run over grass and uphill from the swim to transition.
- Non-standard distances: 36 km (22.4 mi) Olympic bike, 19 km (11.8 mi) sprint bike.
- Few athletes have written about this race; evidence is magazine, news and organiser pages.
Race
How racers feel about it, how well it is run, and how it treats a first timer. Counts for 30% of the overall score.
Toughness: Moderate
- Racer satisfactionLoved3.6
Large fields since 2013 and a positive magazine report, but nobody quoted athletes about how the race felt. · Low confidence
- OrganizationWell run3.7
Interval waves, race-morning pickup and a quick police response in 2018; no athlete accounts of general running. · Low confidence
- First timer friendlyFriendly4.1
Beach start with interval waves, a Try-a-Tri alongside and a 19 km (11.8 mi) bike make it a good first race. · Low confidence
Course traits, not part of the score
- PR potentialFast3.6
Fast, rolling 19 km (11.8 mi) bike, but wind and the long run to transition cost time. · Low confidence
Swim
Wetsuit odds, water temperature, calm, and the experience of the start. Counts for 16% of the overall score.
- Wetsuit legalUsually3.6
Wetsuit rule is not published; the magazine says to have one on hand, which suggests a cool June lake. · Low confidence
- Water temperatureComfortable3.8
Organiser and magazine call the lake usually comfortable in June; no temperatures are published. · Low confidence
- Calm waterMostly calm3.5
Reservoir with no current, sheltered from big swell; no athlete reports on chop. · Low confidence
- Swim easeEasy4.1
750 m (0.47 mi) clockwise rectangle from the beach with interval waves. · Low confidence
- Swim experienceGreat3.6
Beach start in a reservoir with no current; no reports on clarity or feel. · Low confidence
- Swim supportGood3.8
Beach start and interval waves spread the field; rescue and paddler numbers are not published. · Low confidence
Bike
Road surface, closures, scenery and wind. Counts for 18% of the overall score.
- Road surfaceMixed3.2
Local roads plus speed bumps at the park gate; no other surface reports. · Low confidence
- Road closuresPartly closed3.2
Closure status is not stated; a driver hit a rider on the course in 2018, but that is one old report. · Low confidence
- Bike sceneryPleasant3.2
Rural roads north of the conservation area; no scenery comments. · Low confidence
- WindSome wind2.8
Open, exposed roads where wind matters per both the magazine and organiser; out and back, so not a headwind all the way. · Medium confidence
Course traits, not part of the score
- Bike speedFast3.7
Fast out-and-back, but exposed to wind and speed bumps at the park gate. · Low confidence
- Bike flatnessMostly flat3.7
Mostly flat with gentle rollers per the magazine; gain not published. · Low confidence
- Bike simplicityMostly simple3.6
Out-and-back on local roads, with speed bumps at the park entrance. · Low confidence
Run
Crowds, aid stations, conditions underfoot and scenery. Counts for 13% of the overall score.
- Crowd supportDecent3.0
Run is inside the park; no reports of crowds beyond the finish area. · Low confidence
- Aid stationsGood3.5
Three run aid stations with water and electrolyte drink in 2018. · Low confidence
- Run sceneryPleasant3.4
Paved park roads in a conservation area; no scenery comments. · Low confidence
- Run conditionsEasy4.0
Short paved in-park run. · Low confidence
Course traits, not part of the score
- Run flatnessMostly flat4.0
Flat paved park roads with short rolling hills over 5 km (3.1 mi). · Low confidence
Conditions
Air temperature, how predictable the weather is, setting, and spectating. Counts for 13% of the overall score.
- Air temperaturePleasant3.5
June range of 12 to 26 °C (54 to 79 °F) is a regional estimate; 2018 weekend was very hot. · Low confidence
- Weather reliabilityVariable3.3
Only one weather report, a scorching weekend in 2018. · Low confidence
- Venue beautyLovely3.6
Conservation area beach and lake; limited evidence. · Low confidence
- Spectator friendlySome viewpoints3.3
Beach and park roads draw spectators, but they pay park entry and the course is out and back. · Low confidence
Course traits, not part of the score
- Low altitudeLow4.0
About 340 m (1,115 ft) above sea level. · Medium confidence
Stay and travel
Hotels, walkability, getting there, and the town around the race. Counts for 10% of the overall score.
- Hotel availabilityGood3.6
Guelph and Fergus offer rooms; most athletes drive in. · Low confidence
- Hotel valueGood3.5
Typical regional rates; no athlete evidence. · Low confidence
- WalkabilityWalkable3.8
Swim, transition and finish are within the park, but there is a long uphill run to transition. · Low confidence
- Travel easeEasy4.0
About 75 km (47 mi) from Toronto Pearson, easy driving. · Low confidence
- LogisticsSimple4.0
Race-morning pickup and day-of sign-up; Try-a-Tri athletes wait at the gate until the Olympic finishes. · Medium confidence
- Town and foodGood3.6
Guelph is the nearest city; no athlete comments on food or town. · Low confidence
Key facts
- Location
- Guelph, Ontario, Canada
- Typical month
- June
- Latest or next date
- 21 June 2026
- Organiser
- Independent (Subaru Triathlon Series, TriSport Canada)
- Field size
- About 1,400 athletes
- Distances (non-standard)
- 0.8 km (0.5 mi) swim, 19 km (11.8 mi) bike, 5 km (3.1 mi) run
- Swim venue
- Guelph Lake (reservoir) beach (reservoir)
- Swim start
- sprint: beach start, one loop, interval wave start; Olympic start format not stated
- Swim laps
- 1
- Run shade
- not reported
- Air temperature
- 12–26 °C (54–79 °F)
- Humidity
- moderate
- Altitude
- 340 m (1,120 ft)
- Nearest airport
- Toronto Pearson (YYZ), 75 km (47 mi) away
- Where to stay
- Guelph, Fergus
- Booking
- Race kit pickup on race morning: Saturday 6:30 to 7:45 AM, Sunday 7:15 to 8:45 AM. Day-of sign-up with a $5 late fee. Spectators pay park entry ($8.50 adult, $6.75 senior, $3.75 child; debit or credit only); athletes enter free.
What racers and reviewers say
- Triathlon Magazine Canada (Guelph Lake 1 preview)Raced 2018 · article · Positive
Preview of Guelph Lake 1. The lake is usually comfortable in June though a wetsuit is a good idea, and expect a long grass run to transition. The bike is mostly flat with gentle rollers, and wind matters on open roads. The run is flat paved paths with three aid stations. It also served as the club championship.
“Expect a fairly long run across grass.”
- Triathlon Magazine Canada (hot weekend report)Raced 2018 · article · Mixed
Race report from a very hot Guelph Lake 1 weekend with hundreds of athletes across try-a-tri, duathlon and Olympic and sprint triathlon. A Saturday rider was hit by a driver towing a trailer on the bike course and finished with road rash. Police responded quickly and found the driver. Winning times included 1:57:13 Olympic and 56:12 sprint.
- Wellington Advertiser (Guelph Lake 2 report)Raced 2019 · article · Positive
Short report on the 31 August 2019 Guelph Lake 2: sprint triathlon and duathlon with the duathlon starting just after the first swim wave, and both sharing the bike course. No weather, field size or athlete comments.
- Wellington Advertiser (2013 Guelph Lake 2)Raced 2013 · article · Positive
Report on the 2013 series finale, an action-packed day with spectators and participants lining the beach and park roads. The sprint triathlon had 542 participants, 362 men and 174 women. Old but shows the size of the sprint draw.
- Wellington Advertiser (2014 weekend preview)Raced 2014 · article · Positive
Preview expecting about 1,700 athletes over the 2014 weekend with try-a-tri, sprint and Olympic races plus duathlons. Bike and run use local roads north of the conservation area, and the series pitches the weekend as something for everyone. Dated but shows long-standing scale.
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- Subaru Triathlon Series (organiser course notes)Raced 2026 · article · Positive
Organiser description of the 2026 weekend: comfortable water, beach start with interval waves, a long uphill grass run to transition, a fast rolling out-and-back bike exposed to wind, speed bumps at the park gate, and a flat-ish in-park run. Promotional, so it informs course facts rather than how the race felt.
Raced Subaru Guelph Lake Triathlon (Guelph Lake 1 and 2)? Your notes on the course, conditions and logistics help the next athlete decide.
Sources
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