https://www.youtube.com/watch?time_continue=4&v=TDxbDT9hFC4

Everyone is welcome; fast, slow, young, old, runners and walkers.  While every race has competitive runners throughout who either race against each other, themselves or the clock; the Fat Ass is meant to be a fun race. We award the fastest male and female at each distance but the rest of the awards are for fun and our most coveted award goes to the runner who guesses closest to their finishing time; in 2013 the best guess was dead on. 

The Fat Ass Trail Run takes place two hours east of Toronto. The course lengths include a 4k, 7.5k, 10k, 17.5k, 25k, and 50k option. Kids can participate in the "Big Bum" fun run.

from RunGuides.ca