The web Browser you are currently using is unsupported, and some features of this site may not work as intended. Please update to a modern browser such as Chrome, Firefox or Edge to experience all features Michigan.gov has to offer.
Crooked Lake Marsh
- Nominated for Legal Dedication
- The Nature Conservancy Natural Areas Registry
Size: 397 acres
Location: Approximately 8 miles west of Allegan
Management: Allegan State Game Area
Activities: Outdoor education, nature study, photography, birdwatching, hunting, wildflower viewing
Importance: Crooked Lake Marsh is the largest of Michigan's coastal plain marshes, a relict community of plant species disjunct from the North Atlantic coastal plain communities. At one time part of a larger lake that included Little Tom Lake to the west, Crooked Lake Marsh is now a soft-water seepage lake with no inlet or outlet. Although one of several coastal plain marshes in southwestern Michigan, Crooked Lake Marsh shows a greater diversity of habitats than most other sites in the state. Its water level fluctuates greatly, not only throughout the season but also from year to year. During years of low water levels, sedges dominate extensive peat/mud flats which are exposed during the summer.