Places to dig in Greater Toronto Area

Hey everyone!

I have a client who is looking for a place to dig with his nine-year-old rockhound son. Does anyone know of a decent Road cut or anywhere else to dig within a one hour drive of the city?

This any help?
Toronto Area

Thanks! Most of the ones I’m finding locally on there are long closed, one has a mini mall on top of it, but it seems like the Milton Quarry may be a place he can go.