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  • 16 Sep 2023
  • 17 Sep 2023
  • 2 Regatta Rd, Toronto, ON


  • The Mammoth Marathon is made possible with the support of our sponsors, thank you!
  • The Mammoth Marathon is made possible with the support of our sponsors, thank you!

Mammoth Marathon

Advance, online registration is now closed.  Tickets will be available onsite on the day of the event.

Calling all fun and adventure seekers, this is the event you have been waiting for!

Over the course of 2 days, we host a variety of race events with courses of varying size and difficulty, including the BIG race around Toronto Island.  Open to racers of all ages and skill levels.

  • Saturday, September 16, 2023 - Stand Up Paddle Board (SUP) and Surf Ski Races

  • Sunday, September 17, 2023 - Windsurf, Windfoil and Wingfoil Races

Register for one day or both - for racers who finish both the SUP and windsurf races, cumulative time will be calculated and ranked for Super Mammoth winner (combined SUP/windsurf).

Registration now open.

Schedule of Events

Saturday, September 16, 2023

    8:30 am - Check-in to receive a race bib

    9:30 am - Racers meeting for course and safety information

  10:00 am - SUP Long Course 14.4 km race around Toronto Island*

  11:00 am - SUP Medium Course 7km race (minimum 4 racers)

  12:00 pm - SUP Short Course (Kids 12 and under)

  12:30 pm - Lunch

    1:00 pm - Awards and prize draws

Sunday, September 17, 2023

    9:00 am - Check-in to receive a race bib

  10:00 am - Racers meeting for course and safety information

  11:00 am - Medium and Long Course 14.4 km around Toronto Island*

  12:00 pm - Short Course / LTW Student Course** (~ 1 hour)

    1:00 pm - Lunch

    2:00 pm - Awards and prize draws

* Note that Long Course participants that do not make it to T4 by a certain time will be redirected to the Medium Course.

**LTW Students in the Stay Hooked program must register online through this page AND contact Simon to make arrangements for equipment no later than Thursday September 14, 2023 at 5:00 pm.

To ensure the safety and enjoyment of all participants scheduled routes and start times are subject to change on the day of the event.

Course Routes

There are 3 races courses to choose from on each day:

  • Long Course - 14.4 km around Toronto Island
  • Medium Course - 5-7 km course within the Outer Harbour
  • Short Course - for beginners, SUP kids (12 and under), and LTW participants in the Stay Hooked windsurf program. 

The route for the 14.4 km course around Toronto Island can be viewed by clicking here.  Racers must keep away from the buoys near the island airport, you may be prosecuted and subject to a hefty fine if you enter the "Keep Out Zone" marked by these buoys.  The direction of the course will be determined by the wind direction on race day.  

The route for all other races will be determined on the morning of the races depending on wind and weather conditions.

Please select the the course best suited to your skill and ability  during registration. Changes will be permitted on the day of the event to ensure everyone's comfort and safety.

Safety - Mandatory requirements

  • PFDs and a whistle for all participants. 

  • Leashes  for SUP, surfski and wing foil.

Registration and Inclusions

  • 2-Day Participation - $80 in advance / $90 thereafter
  • Adult (18+) - $55 in advance / $60 thereafter
  • Youth (17 & under) - $25
  • Lunch only - $20

Rates above are $Cdn, inclusive of tax.

Advance registration and prices available online until 5:00 pm on Friday September 15, 2023. Participants can also register onsite on the day of the event.

  • All participants must check in upon arrival to receive their race bib.

  • Lunch will be provided for all participants, included in the cost of registration.  Additional lunch tickets can be purchased for friends and family coming to cheer you on.

  • Awards and prize draws will begin once all racers have returned to shore.


Parking at the club is limited. As a courtesy to those that carry their boards with them in their car we kindly ask that all others park at the main Cherry Beach parking lot (west of the club) or find alternative transportation (bike, walk, skate, TTC, carpool, etc). 

Thank you to our supporters:


Want to join the fun without racing?

Volunteers required to support race day operations include: registration, time keeping, lunch service, boat support and photography. Please register in advance and indicate your volunteer preference in the comments section.

Volunteer work qualifies for member and high school volunteer hours.  Register here --> MAMMOTH VOLUNTEER 2023

May the warmth last long and the wind blow strong!!!


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