Managed by US Army Corps of Engineers
About Boulder Day Use
Boulder Day Use Area is situated on the eastern shore of Carlyle Lake, a prime getaway for city-dwellers and families. Located 50 miles east of St. Louis, the area offers the peaceful retreat of a small town combined with the grandeur of Illinois' largest man-made lake.
Campground Amenities
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Marina
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Playground
Seasonal information
2026
(Current year)
2026 Season availability
Current season
Upcoming seasons
Past seasons
Closed periods
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Currently closed
- Opens on May 1
Location Boulder Day Use
Address:
801 Lake Road
Carlyle, IL, 62231
United States
(Address: 25501 Boulder Access RD, Shattuc, IL 62231). From I-57, take Old U.S. Highway 50 west. Continue for 19 miles through Salem, Odin and Sandoval. Turn north on Boulder Road and follow 7 miles to the day use and recreation area.
Latitude & Longitude: 38.6961 / -89.2322
Elevation: 141 feet