Take Route 202 South towards West Chester. Turn left onto Smithbridge Road. Smith- bridge road is the first light after 202 splits past US Route 1. If you pas into the state of DE you’ve gone too far. Continue on Smithbridge for about 3 miles. Garnet Valley High School will be on right. Look for the sign at the driveway. If you go under an overpass you’ve gone about a block to far. The school sits back from the road down a long driveway.