I found my light!
Easy up is a fire road just north of the school parking garage. It's a quick access to the northern section of wildcat, comes out by the parking area for the pond. Good if you want to do a quick run of Oreland, for example.
Anyways, I did a trail ride today of just that, and found my light. It still had battery left too, must have turned itself off when it bounced on the ground. Thanks for being willing to help out!