Map and Directions

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Directions from St. Louis International Airport:
Turn right onto Lambert International Blvd. Turn left to merge onto I-70 W. Take exit 232A-232B and merge onto I-270 S toward Memphis. Take Exit 12 toward Wentzville and merge onto I-64 W/US-40 W. Take Exit 24 at Mason Road and turn left. From Mason Road turn left onto Clayton Road. Turn left at the second Principia entrance. (There will be a Gate House at this entrance.)

Principia School, 13201 Clayton Road, St. Louis, MO 63131, 314.434.2100


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