Horse tracks (?) in Ontario

I assume this is a big area for training horses? There are more ovals to the northeast, not far out of this image.

https://www.google.com/maps/@42.1435697,-83.0319332,3640m/data=!3m1!1e3?entry=ttu&g_ep=EgoyMDI0MTIwMi4wIKXMDSoASAFQAw%3D%3D