Do you mean the trails at Trexler Nature Preserve? If so they are located in Schnecksville just off of Rt 309. Google and you should be able to get driving directions. Several miles of singletrack with some bumps in the trails and some very steep swooping berms. Careful cuz you can really get moving there. The outer loop is nothing spectacular. Lots of climbing involved and not very scenic or fun. Hope this helps.