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Middle Thompson Lake Fishing Regulations
What to check before fishing at Thompson Chain of Lakes State Park in Lincoln County, Montana.
Fishing at Middle Thompson Lake
Thompson Chain of Lakes State Park provides access to Middle Thompson Lake, a public body in Lincoln County, Montana. Species-specific size and bag limits can vary by water body and change seasonally, so always confirm current rules for Middle Thompson Lake specifically before you fish — statewide defaults don't always apply to every lake, river, or stretch of coast.
Check current regulations for Middle Thompson Lake →Fishing License
Fishing in Montana is regulated by the Montana Fish, Wildlife & Parks. Most anglers 16 and older need a valid license, with some exceptions for residents, youth, or shore-based fishing depending on the state.
Get a Montana fishing license →Before you cast a line, check:
- Size and bag limits for your target species on Middle Thompson Lake specifically
- Whether Middle Thompson Lake has any special regulations (slot limits, catch-and-release zones, closed seasons)
- Your license requirements based on age, residency, and whether you're fishing from the bank or a boat
- Any required stamps or endorsements for specific species (e.g. trout, saltwater)