Steve,
It's in Uhrichsville, Ohio, right off Rt. 250. Assuming you are coming from the north, you take 77 South to New Philadelphia, then get on 250 East. From there it is about 5 miles. You stay on 250 until you are sitting at a stop light in Uhrichsville (cross road is McCauley Drive). You will have a McDonalds on the left and a used car lot on the right. Turn right onto McCauley drive. You will pass a KFC, then the road curves to the right. You will then see Big Wheelie Skate Center (a roller rink). You turn at the roller rink (left). Look straight ahead and you will see a sign for Crow Canyon. You will then take a right, then almost immediately take a left. The gate (hopefully!) will be open! Check out the website at crowcanyonmx.com for times.
What is it like? It has a pretty big MX track, a pee wee MX track and miles of trails. THe trails vary from tight and technical to pretty wide open. They are mixed really well. By that I mean you can be riding in tight woods for 1/2 mile or so, then break into wide open. Enjoy.