Mammoth Marathon 2025
Calling all fun and adventure seekers—this is the event you’ve been waiting for!
Over 2 action-packed days, we host a variety of race events with courses of all sizes and difficulty levels—including the legendary BIG race around Toronto Island. Open to racers of all ages and skill levels, rain or shine.
Dates
-
Saturday, September 20, 2025 → Stand Up Paddleboard (SUP) Races
-
Sunday, September 21, 2025 → Windsurf, Windfoil, and Wingfoil Races
Register for one day or both! Competitors who finish both the SUP and windsurf races will have cumulative times calculated to crown the Super Mammoth Winner (combined SUP/Windsurf).
Registration now open. Notice of Race details coming soon.
Schedule of Events
Saturday, September 20, 2025 – SUP Races
-
8:00 am – Volunteer Check-in
-
8:30 am – Competitors Check-in
-
8:45 am – Boat Skippers, Crew & Photographers Meeting
-
9:00 am – Competitors Meeting
-
10:00 am – SUP Long Course (14.4 km Round Toronto Island)*
-
10:30 am – SUP Medium Course (7 km, min. 4 racers)
-
12:00 pm – SUP Short Course (Kids 12 & under)
-
12:30 pm – Lunch
-
1:00 pm – Awards & Prize Draws
Sunday, September 21, 2025 – Windsurf, Windfoil & Wingfoil Races
-
8:30 am – Volunteer Check-in
-
9:00 am – Competitors Check-in
-
9:30 am – Boat Skippers, Crew & Photographers Meeting
-
10:00 am – Competitors Meeting
-
11:00 am – Long Course &. Medium Course Start
-
11:30 am – Short Course / LTW Student Course** (~1 hr)
-
2:00 pm – Lunch
-
2:30 pm – Awards & Prize Draws
* Note: Participants not reaching T4 by the cutoff time will be redirected to the Outer Harbour (Medium Course). Round the Island has a 3.5-hour max time (tow support after cutoff).
** LTW “Stay Hooked” students must register online and contact Simon for equipment arrangements by Thursday, September 18, 2025, at 5:00 pm.
️Course Routes
Choose from 3 race routes each day:
-
Round the Island (Long Course) – 14.4 km around Toronto Island
-
Outer Harbour (Medium Course) – 5–7 km in the Outer Harbour
-
Learn to Windsurf / Short Course – perfect for beginners, kids (12 & under), and LTW program participants
⚠️ Important: Racers must avoid the “Keep Out Zone” buoys near the island airport—violations may result in prosecution and fines. Course direction will depend on race-day wind.
Safety Requirements
-
Mandatory: PFDs + whistle for all participants
-
Leashes required for SUP, surfski, and wing foil
Registration & Inclusions
Advance pricing ends Tuesday, September 16, 2025, at 8:00 pm.
Onsite registration also available.
✔️ Registration includes race entry, bib, and lunch.
✔️ Additional lunch tickets available for family & friends.
✔️ Awards & prize draws after all racers return.
Parking
Parking at the club is limited. Please leave spaces for those transporting boards. Others are asked to park at the main Cherry Beach lot (west of the club) or arrive via bike, walk, skate, TTC, or carpool.
Want to Join the Fun Without Racing?
Volunteers make this event possible! Help with:
Registration
⏱️ Timekeeping
Lunch Service
Boat Support
️ Beach & Participant Assistance
Photography
Clean-up Crew
Please register in advance and indicate your volunteer preference.
✨ Volunteer hours count toward member & high school requirements!
Thank You to Our Sponsors!
The Mammoth Marathon is made possible through the generosity of our sponsors.
NEED PRACTICE?
Join Peter F this Sunday at 12:00 pm for a 2-hour group race practice focused on:
-
⬆️ Upwind Tacking
-
⬇️ Downwind Gybing
Perfect your skills, sharpen your turns, and get race-day ready!
Bonus: Free energy drink for anyone who brings a reusable container. (Stay powered up and eco-friendly!)
Ready to Test the Waters?
Thinking about tackling the Round the Island course but want a sneak peek first? ️
Ian B is running a coach boat session out to the first mark west of Toronto Island—the perfect warm-up to get a feel for clearing the island.
Shoot us an email to let us know you’re in!
