really great site especially for pa hikes cuz the guy who runs it is from a town that's kinda in the center of the best scenic trails in pa:
https://myhikes.org/you have to pay 10 dollars once to download .gpx files but it is a good cause
uncoveringpa.com and
pabucketlist.com are two websites with great info on various hikes and other attractions in PA as well
the good part of PA is there's generally lots of info
BONUS:
https://www.alltrails.com/explore/recording/casparis-overlook-trail-75b9b6dfound this lovely trail on the alltrails community content section
located just south of connellsville pa, the road to access the trailhead is terrible towards the end, with decent sized chunks of rock in the road, and a water crossing, you could skip the water crossing and hike from there, its on private land but I didn't see any no trespassing signs and there was parking right before the ford, and it would add 1 mile each way to the hike.
You park at the casparis caves, which is an abandoned limestone mine, there's a State Game Lands lot (its on public land) and you walk on the flattish 4x4 road (basically) to the best overlook of the Yough gorge - that I have personally seen. Ohiopyle is great but there's no place nearby to see the Yough (that I know of) from above like this.
