You are right. I thought the county owned it when I saw county employees there all the time, including taking the daily use fee. I copyed this from the Lake website. ---->

Location: Evergreen Lake is located approximately 15 miles North of Bloomington, Illinois and is easily accessible by taking I-39 North to the Lake Bloomington/Evergreen Lake Exit, then proceeding west on the Lake Bloomington Road (2500N).

Description: Evergreen Lake was built in 1970 to serve as a secondary water source for the City of Bloomington. The lake is owned by the City of Bloomington and is managed by the McLean County Department of Parks and Recreation. Evergreen Lake is part of Comlara County Park. The lake is 925 acres and has an average depth of 19.7 feet and a maximum depth of 50 feet. There are 2 boat launches on the lake and one canoe launch. Comlara County Park offers 137 campsites, a swimming beach, and showers. The Friends of Everbloom is an organization that assists with habitat projects and improving the quality of Evergreen Lake. To learn more about their organization, visit their web page Friends of EverBloom - Home.