Map and Directions
Principia College is located in Elsah, Illinois, 12 miles north of Alton, off the Great River Road, Route 100. To reach the campus entrance coming from Alton on Route 100, turn right at Elsah Road, bearing right to Mill Street. Go halfway through the Village of Elsah to the first stop sign. Turn right and go up the hill.
If using GPS, these are the coordinates for the Gate House:
Latitude: 38.9555, Longitude: -90.3475.