Brady's Run Park offers technical single track riding. Take Route 60 to Chipawa exit, turn right, go three miles to park on right. Trailheads lead off from near the Ice Arena. Moraine State Park North of Pittsburgh, Moraine State Park offers some technical single track riding. Take I-79 north to the Moraine State Park exit and follow signs.
Trailhead is on the north shore.
Mineral Beach Take Route 51 through Library, past Trax Family Farms, right turn into Mineral Beach, a swimming pool and park area. There you will find a single track 4 mile loop. It follows the railroad tracks. You can ride along the sides of the tracks both up and down stream from that road. I've found that you can ride all the way from Oakmont, past New Kensington, and in to Arnold, about 10 miles each way.