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Fort de Chartres is located at 1350 IL Route 155, 4 miles west of Prairie du Rocher, Illinois, just an hour from St. Louis. The site is open Wednesday-Sunday, 9 a.m. to 4:30 p.m.
Directions: Fort de Chartres State Historic Site is located 4 miles west of Prairie du Rocher, about an hour’s drive south of St. Louis. Take IL-3 to Ruma and then turn west on IL-5. Follow IL-155 through Prairie du Rocher to the site.
Map link.
GPS Coordinates
N 38° 05.217′
W 90° 09.514′
For site information, tours, and events, please call (618) 284-7230 or visit the Fort de Chartres State Historic Site website or the Fort de Chartres State Historic Site Facebook page .
For the latest news and updates, information can also be found at www.facebook.com/Les-Amis-du-Fort-de-Chartres or email lesamisdufortdechartres@gmail.com