Boat Launches on Grass Lake
Grass Lake Boat Launch
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Connected Waterways
Specific inflow and outflow data for Grass Lake in Montmorency County is limited. The lake sits within the northeastern Lower Peninsula watershed system in a region drained by tributaries feeding the Thunder Bay River and Au Sable River systems.
Winter & Ice Safety
Grass Lake's shallow, weedy profile means it likely freezes early and solidly in a typical Montmorency County winter. Pike and panfish would be the main ice fishing targets. Always check local conditions before heading out.