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Fel-Pro RRR Conservation Area 
1520 Crystal Lake Rd
Cary, IL 60013
8153386223
https://www.mccdistrict.org/visit___explore/places_to_go/find_a_site/fel-pro_rrr.php
Natural Area: Birding, Picnic, Walk
Approximately 75 acres contain recreational facilities while the remaining 145 acres are dedicated as a wilderness area. MCCD and YMCA of McHenry County jointly manage this site.