The Forest Preserves of Cook County announced the 2026 spring inland trout fishing season, opening on Saturday, Apr. 4, at Axehead Lake and Belleau Lake in Park Ridge, Sag Quarry East in Lemont, Horsetail Lake in Palos Park and Green Lake in Calumet City. The Forest Preserves is stocking approximately 1,000 pounds of rainbow trout at Sag Quarry East; 1,500 pounds at Axehead Lake; and 1,500 pounds at Belleau Lake; while the Illinois Department of Natural Resources is stocking 700 pounds at Green Lake; and 600 pounds at Horsetail Lake. As part of the IDNR’s stocking program, fishing for and possession of any trout is illegal from March 15 until 5 a.m. on April 4. In addition, the Forest Preserves’ trout lakes will be closed to all fishing from Monday, March 30, until sunrise on Saturday, April 4. For a list of all lakes and waters open to public fishing within the Forest Preserves of Cook County, visit fpdcc.com/fishing/, and download the Fishing Guide.