Follow U.S. Route 422 West to "North Shore - Moraine State Park" ex-it. (The sign is brown and it is at the exit; there is no previous warning). Follow Park Road to the North Shore (Lakeview) swimming area.
From I-79 and West:
Follow U.S. Route 422 East (Butler/New Castle exit) to the Moraine State Park exit. (This is actually the South Shore exit, but the signs for east bound exit just read "Moraine State Park".) Turn left at the stop sign at the end of the exit ramp, and get back on U.S. Route 422 heading West. Refer to above directions. (This is a nuisance, but its the easiest legal way to get to the North Shore exit from points west of Moraine State Park; there is no North Shore exit from the Eastbound lane of Route 422).