Gun Lake sits within the Kalamazoo River watershed. The lake's irregular shape with multiple islands and channels gives it a complex shoreline, and it connects to the broader drainage system flowing west toward Lake Michigan. Smaller inflows feed the lake from the surrounding Barry and Allegan county landscape.
Gun Lake sees regular ice fishing activity in winter, with the shallower bays and channels freezing first and most reliably. The deeper open-water sections can be slower to form safe ice. Always check local reports before heading out — the lake's size means conditions can vary significantly from one end to the other.
Is this the Gun Lake with the casino and state park?
First, the disambiguation this lake spends its life performing: this is Mason County's Gun Lake, near Fountain in Michigan's western lake belt — not the 2,600-acre Gun Lake of Allegan/Barry County fame with the casino and the state park. This one is the small, wooded, local version, and its search traffic suggests plenty of people find it exactly because they're looking for the other one — then discover a quiet alternative worth knowing.
What they find: honest small-lake fishing — bass, pike, and panfish on unhurried water — with state forest campground access in the area (Gun Lake's launches include state-forest-campground water) and the Ludington/Hamlin big-water scene twenty-odd minutes west when the mood changes. County-locked sourcing applies to everything written here; the two Gun Lakes contaminate each other's information relentlessly.