Worlds End State Park is in a narrow S-shaped valley of the Loyalsock Creek just south of Forksville, Sullivan County. Loyalsock Canyon Vista, reached via Mineral Spring and Cold Run roads, provides outstanding views, especially during fall foliage.
I remember doing this hike years ago when I was a Girl Scout at nearby Camp Lycogis. It follows the Loyalsock Trail for a good section of the trail, which has been rerouted. When I researched this trail it was telling me it was less than 3 miles. Since the trail was rerouted it was about 4.75 miles out and back, not a loop. Many parts of the trail are headed straight up the mountain, so it can be rather strenuous. When I went the water flow was low, so there wasn't much to see at the falls. Be careful at the top, it can get slippery and a fall would likely be the end of you. Even if the water isn't flowing, it's still a beautiful hike. The trail is very well blazed.
Me and my boyfriend and dog just finished the first half of this trail from the trailhead at Route 87 to Dry Run Road (around 30 miles so half). This trail is very difficult in many areas and has a lot A LOT of mild to difficult stream crossings and much elevation change in short distances. Even for regular backpackers like us we only accomplished 15 miles in the first day and we started at 9 am. I also want to clarify the we carried a backpacking GPS for mileage and the mile markers on the trail and in the Loyalsock Trail Guide are not accurate. We noticed this in the first 10 miles. It is disheartening and should be fixed. Having said that we will return and finish the other half soon. Very intense trail in central PA! Not for the weak willed!