Not a travel destination, but definitely a great after work ride. Many short steepies, a couple of nice fast flowing loops (1-1.5) miles, some as short as .3 miles in length. The entire network is 7.36 miles. Night riding is allowed with a free permit, info available on the website.
Highway 22 East into Murrysville, turn right on Traffird Rd (across from McDonalds), as you start up the hill after crossing the railroad tracks bear left onto Pleasant Valley Rd 1.2 miles. Look for small parking lot and sign on left side of road.
http://www.singletracks.com/item.php?c=1&i=9824