The Rock Run Trails System was developed for cross-country skiers to the east of Black Moshannon State Park in the early 1980s, by converting several former logging railroad grades.

[6] The main trailhead for the RRTS is at the corner of Pennsylvania Route 504 and Tram Road, 4.5 miles east of the state park.

[7] The RRTS heads north across a high plateau area, following a path formerly known as the Entrance Trail.

[8] Back on the main RRTS loop, the trail crosses the Middle Branch of Rock Run at 5.3 miles and makes a sharp U-turn back to the south, now following the former Forks Trail,[9] which utilizes switchbacks built for an old logging railroad to climb the side of the valley.

[10] The Allegheny Front Trail rejoins the RRTS at 7.4 miles, and the two are concurrent for the rest of their respective distances.