Karns City, Slippery Rock and Union/A-C Valley have learned their destinations for the first round of high school football playoff action.

Karns City travels to Keystone for a 7 p.m. kickoff Friday in the District 9, Class 2A playoffs. Slippery Rock takes on Harbor Creek at 7 p.m. Saturday in District 10 action at Erie’s Veterans Stadium.

Union/A-C Valley has a bye this weekend in District 9, Class 1A, and will play at Redbank Valley next weekend.

Seneca Valley, Mars and North Catholic will learn their WPIAL playoff opponents at a meeting Monday night in Greentree.