Currently the trail is a bit overgrown but is a good ride if you live in the area. It can be a bit confusing until you become familiar. It quickly drops into the creek bed from the start and and goes into a hilly climb. (Lots of roots and very hilly) You cross the cut field for the powerlines and come into the woods again. It is very fast on the way out with a gradual downhill. It is an out and back and can be a figure 8 if you utilize the fireroad. Ride it and explore and stay off the hiking trails. They are mostly in the first entrance area even though they offer some knarly downhill but stay off please.
If driving on I-75 N take exit 21 Cin-Day Rd and turn right off the exit. If coming south turn lefyt and go over the overpass. Continue on Cin-Day Rd until the first stop light. Turn left onto Station Rd. (Look for the blue signs that say Keehner Park) You will cross over railroad tracks and immediatley after turn left onto Barret Rd. Continue for a few miles and Keehner Park will be on the right. Ensure to go o the second entrance with the Tennis courts and ball fields. Park at the Tennis courts and look for the small white sign in the treeline directly behind the courts. This is the trailhead. If you search Keehner park mountain bike trail a few maps are available but not very accurate.
http://www.singletracks.com/item.php?c=1&i=4631