If you find yourself in the Detroit Metro area, in addition to Poto mentioned above, I’d highly recommend Pontaic Lake. Group regulars also include Maybury and Murray Lake. There’s a lot of fun riding in SE MI, but don’t expect “out West” types of all-day trails. Think “high-speed XC” and you’d be closer – not like Copper Harbor at all, which is 11 hours away. But plenty of fun to be had.