It's a huge 4x4 party put on by twisted trails 4 wheel club. Google them and you'll find info. If you search "dog party" on you tube, you can watch videos from past parties. If you don't know, Copemish is about 10 or so miles NW of Mesick, home of the blessing of the jeeps, on M115. It's Feb, 18th and $15 at the gate. You must have a flag (they sell em) to wheel. It's crazy! If all you do is watch, it's still fun!