The Fat Ass Trail Run began in 2003 with 23 participants who fell in love with running the trails of the Batawa area. Over the years, it has grown into one of Ontario's largest trail races, maintaining an inclusive atmosphere welcoming runners and walkers of all ages and abilities.

The event features a variety of trail distances and a unique timed 6-hour race, attracting over 500 runners annually to enjoy the diverse and challenging terrain in late fall.

- Mixed terrain: rocks, roots, wide trails, single tracks
- Wooden bridges and creek crossings
- Hills and meadows
- Variable race conditions including snow, mud, or sun

- Inclusive atmosphere welcoming runners and walkers of all ages and abilities
- Multiple race distances including timed 6-hour event
- One of Ontario's largest trail races with over 500 participants annually
- Opportunity to experience fall running in the Batawa area