Alum Creek is a lot of fun. I prefer phase 2 because it is usually drier and has logs and stuff to ride on. Also Mohican wilderness is crazy and only like an hour away. Ive ridden there twice and I was told it has the best downhill in Ohio. Theres a cross country path, a downhill with some jumps and a rock garden.
Link to trail conditions
http://joinomba.org/index.php?page=4&sid=0cf2facb75ffc59b418e9e4104f70a28