We were in Pittsburgh this weekend and took this trip video of a route from downtown to the trailhead in Homestead (and a little beyond). Sort of improvised a route with no traffic. Eventually, the trail will be completed through the waterpark and around the industrial areas. For now, the only real issues are finding the off-road path along the river behind the huge shopping mall area, and getting through the waterpark area. We chose to ride along the rail tracks where possible. On the way home, the back gate of the waterpark was locked, so we had to push along the tracks a little longer distance (fun when a freight train sped past). We ran into a local, who advised that it might have been better to go around the other side of the tracks along the service road… In any event, everyone we spoke with said under no circumstances take the highway — no shoulder, high speeds, bad sight lines. So for now, the railbed is best.
http://www.strava.com/rides/46kilometers-6685826
[video=youtube_share;TGMsMN4kwOg]http://youtu.be/TGMsMN4kwOg[/video]