Fat Ass Trail Run returns on November 16, 2025, to Batawa Ski Hill in eastern Ontario for one of the province’s largest and most community‑driven trail events. Founded in 2003 with just 23 participants, it now welcomes runners and walkers of all ages and paces via multiple distances—from a 1 km kids’ "Big Bum" run to the 50 km ultra, plus a unique Bad Ass 6‑hour nonstop timed challenge. Courses feature a thrilling mix of terrain: forested single‑track, rocky and root‑covered trails, meadows, creek crossings, wooden bridges, and steep ski‑hill climbs.With low‑cost entry, minimal frills, and a welcoming ethos, the event emphasizes inclusivity—fast, slow, young, old, runners or walkers are all welcome. Medals are awarded for top males and females in each distance, while a whimsical “best finish‑time prediction” award adds local flair.
Races
50 km
25 km
17 km
10 km
7 km
5 km
Race Date:
16 November, 2025
The 50 km Ultra begins at 7:30 AM EST and covers five loops of the trail system with varied terrain—rocks, roots, meadows, creek crossings and ski-hill climbs—for a challenging and scenic adventure. Organized by Dirty Soles Trail Run, it takes place on 16 November 2025, at Batawa Ski Hill, Quinte West, Ontario.
Weather based on historical averages.
FAQs
What is the Fat Ass Trail Run 50 km?
How long is the Fat Ass Trail Run 50 km?
Where does the Fat Ass Trail Run 50 km take place?
What is the elevation gain of the Fat Ass Trail Run 50 km?
How can I prepare for the Fat Ass Trail Run 50 km?
How do I choose the right training plan for the Fat Ass Trail Run 50 km?
The 50 km Ultra begins at 7:30 AM EST and covers five loops of the trail system with varied terrain—rocks, roots, meadows, creek crossings and ski-hill climbs—for a challenging and scenic adventure. Organized by Dirty Soles Trail Run, it takes place on 16 November 2025, at Batawa Ski Hill, Quinte West, Ontario.
The Fat Ass Trail Run 50 km is 50km long.
The Fat Ass Trail Run 50 km takes place in Batawa, ON, Canada.
Runna classifies the Fat Ass Trail Run 50 km elevation profile as Moderate.
The best way to train for the next race is to use a personalized training plan that takes into account your current running ability, schedule, and preferences.
This will help you steadily improve your running performance and get ready for the race without risking an injury.
Check out our training plans to find the best running program for your goals!
Which plan you choose will depend on your experience, schedule, objectives, and the date of the race.
Runna offers personalized training plans for every runner and every goal: Whether this is your first, 10th or 100th race, we'll help you get the most out of your training and smash your goals.
Check out our training plans to find the best running program for your goals!
What is the Fat Ass Trail Run 50 km?
The 50 km Ultra begins at 7:30 AM EST and covers five loops of the trail system with varied terrain—rocks, roots, meadows, creek crossings and ski-hill climbs—for a challenging and scenic adventure. Organized by Dirty Soles Trail Run, it takes place on 16 November 2025, at Batawa Ski Hill, Quinte West, Ontario.
How long is the Fat Ass Trail Run 50 km?
The Fat Ass Trail Run 50 km is 50km long.
Where does the Fat Ass Trail Run 50 km take place?
The Fat Ass Trail Run 50 km takes place in Batawa, ON, Canada.
What is the elevation gain of the Fat Ass Trail Run 50 km?
Runna classifies the Fat Ass Trail Run 50 km elevation profile as Moderate.
How can I prepare for the Fat Ass Trail Run 50 km?
The best way to train for the next race is to use a personalized training plan that takes into account your current running ability, schedule, and preferences.
This will help you steadily improve your running performance and get ready for the race without risking an injury.
Check out our training plans to find the best running program for your goals!
How do I choose the right training plan for the Fat Ass Trail Run 50 km?
Which plan you choose will depend on your experience, schedule, objectives, and the date of the race.
Runna offers personalized training plans for every runner and every goal: Whether this is your first, 10th or 100th race, we'll help you get the most out of your training and smash your goals.
Check out our training plans to find the best running program for your goals!
More
Sport:
Running
Tags:
Nature
Kid friendly
This event listing is for informational purposes only. Runna is not affiliated with, endorsed by, or sponsored by Fat Ass Trail Run 2025 or Dirty Soles Trail Running. All event details are based on publicly available information and are provided solely to help users discover running events. Runna does not use any official logos, images, or proprietary content from this event or its organiser. Any trademarks or names mentioned are used descriptively to identify the event in a factual manner. For the most accurate and up to date information (including to register or purchase an entry to the event), please visit the Fat Ass Trail Run 2025 website.
