The 2-mile walk started from Hart Plaza at 10 a.m. and went along parts of the RiverWalk.
Pet lovers walked with their four-legged friends to help raise critical funds for the Michigan Humane Society.
Everyone was welcome to walk, with or without a pet. Walkers who raises $156 or more received an official 2013 Mega March T-shirt at the walk.
The Michigan Humane Society says $156 is the amount needed to change the life of just one animal from homeless to loved.
For more information on how you can help visit michiganhumane.org.