Follow these roads to explore Washington's Trail through Butler County. Driving guides also can be requested by writing to French and Indian War 250, Inc., 425 Sixth Ave., Suite 1100, Pittsburgh, PA 15219.

• Route 68 east through Zelienople to Harmony

• Main Street in Harmony to Mercer Road and Route 19

• Route 19 north to Portersville

• West Park Road north to Route 422

• Route 422 east to Route 528

• Route 528 north to Routes 8 and 173

• Route 173 north to Slippery Rock and Route 108

• Route 108 east to Route 8

• Route 8 north to the Venango County line