Fat Ass Trail Run
- Date Sun 16th November 2025
- Location Quinte West, ON
- Price $51.26 - $83.94
- Races 8 races
- Distances Ultra, 5km, 10km
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Event summary
Get ready for an exhilarating day of adventure at the Fat Ass Trail Run, happening on Sunday, November 16, 2025, in the picturesque Quinte West, Hastings! This beloved event, which started in 2003 with just 23 participants, has blossomed into one of Ontario's largest and most inclusive trail races. Whether you're a seasoned athlete or a casual walker, there’s a distance for everyone to enjoy, including the challenging 50km, the Bad Ass 6 Hour, and several shorter options ranging from 5km to 24.5km.
Participants will experience a thrilling mix of terrains, featuring rocks, roots, wide trails, and beautiful meadows, all while enjoying the camaraderie of fellow trail enthusiasts. With a variety of start times throughout the day, including the 50km kicking off at 7:30 AM and the Big Bum Kids' 1km at 1:30 PM, there's plenty of excitement to go around. Plus, every racer has a chance to earn a medal, with awards going to the top three male and female finishers in each category. Join us for an unforgettable day of running, nature, and community spirit at the Fat Ass Trail Run!
Participants will experience a thrilling mix of terrains, featuring rocks, roots, wide trails, and beautiful meadows, all while enjoying the camaraderie of fellow trail enthusiasts. With a variety of start times throughout the day, including the 50km kicking off at 7:30 AM and the Big Bum Kids' 1km at 1:30 PM, there's plenty of excitement to go around. Plus, every racer has a chance to earn a medal, with awards going to the top three male and female finishers in each category. Join us for an unforgettable day of running, nature, and community spirit at the Fat Ass Trail Run!
Organiser's Description
The Fat Ass began in 2003 with 23 participants who didn't quite know what they had gotten themselves into and who fell in love with running the trails of the Batawa. Over the years the Fat Ass has grown to be one of the biggest trail races in Ontario, and despite the size of it, we maintain the inclusive atmosphere so everyone feels welcome; fast, slow, young, old, runners and walkers. We have various distances, with various start times:50km- 730amBad Ass 6 Hour- 8am24.5km- 915am16.5km-1030am10km- 12pm7.5km- 1pm5km- 2pmBig Bum Kids' 1km- 130pm
NEW FOR 2025:
Our 5.5km will be reduced to 5km to avoid confusion on the trails.
NO refunds. We understand that many of our distances sell out quickly and that the life can change a lot between the time you register to race day. However, we can no longer offer refunds, but will extend the date of allowed transfers (November 7th). These transfers must be made between individuals at their own expense.
PLEASE register with the email you wish to receive communication from us about your race details. These are vital details to help your race day run smoothly.
50KM Rules/RegulationsThere is a hard cutoff time of 5pm.
Runners will be required to have a headlamp after 3pm.
Runners not on their last loop by 3:45pm will not be allowed to finish their last loop.
Pacers allowed on the last loop.
Poles are okay too.
Course Description:The Fat Ass is a mixed bag of tricks. Rocks, roots, wide trails, single tracks, wooden bridges, creek crossings, hills and meadows. Sometimes snow, often mud, sometimes nothing but sun. Its a guaranteed adventure, brace yourself for anything.
Aid Stations/First-Aid:There are three aid stations. One on the south loop, one on the north loop and one in between. These are all stocked with water, Tailwind, and a plethora of snacks.First Aid is provided by Neil Graham of Stat Med CanadaPorta potties will be available at the start/finish line area
Parking:There is ample parking at Batawa Ski Hill. There is also overflow parking at the Batawa Community Centre. Please do your best to not park on the streets and if you are required to do so not block the driveways of residents.
Awards:Medals will be awarded to the first, second and third place male and female for each distance.
Big Bums will also all receive participant ribbons.
Swag/Merch:Various Dirty Soles merchandise will be available for sale. Fat Ass 2025 race shirts are available for an extra cost.Bad Ass 6-Hour participants can look forward to exclusive swag included in their entry fee.
Our Sponsors:
NEW FOR 2025:
Our 5.5km will be reduced to 5km to avoid confusion on the trails.
NO refunds. We understand that many of our distances sell out quickly and that the life can change a lot between the time you register to race day. However, we can no longer offer refunds, but will extend the date of allowed transfers (November 7th). These transfers must be made between individuals at their own expense.
PLEASE register with the email you wish to receive communication from us about your race details. These are vital details to help your race day run smoothly.
50KM Rules/RegulationsThere is a hard cutoff time of 5pm.
Runners will be required to have a headlamp after 3pm.
Runners not on their last loop by 3:45pm will not be allowed to finish their last loop.
Pacers allowed on the last loop.
Poles are okay too.
Course Description:The Fat Ass is a mixed bag of tricks. Rocks, roots, wide trails, single tracks, wooden bridges, creek crossings, hills and meadows. Sometimes snow, often mud, sometimes nothing but sun. Its a guaranteed adventure, brace yourself for anything.
Aid Stations/First-Aid:There are three aid stations. One on the south loop, one on the north loop and one in between. These are all stocked with water, Tailwind, and a plethora of snacks.First Aid is provided by Neil Graham of Stat Med CanadaPorta potties will be available at the start/finish line area
Parking:There is ample parking at Batawa Ski Hill. There is also overflow parking at the Batawa Community Centre. Please do your best to not park on the streets and if you are required to do so not block the driveways of residents.
Awards:Medals will be awarded to the first, second and third place male and female for each distance.
Big Bums will also all receive participant ribbons.
Swag/Merch:Various Dirty Soles merchandise will be available for sale. Fat Ass 2025 race shirts are available for an extra cost.Bad Ass 6-Hour participants can look forward to exclusive swag included in their entry fee.
Our Sponsors:
Fat Ass Trail Run