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Deep Lake Fishing Regulations
What to check before fishing at Millersylvania State Park in Thurston County, Washington.
Fishing at Deep Lake
Millersylvania State Park provides access to Deep Lake, a public body in Thurston County, Washington. Species-specific size and bag limits can vary by water body and change seasonally, so always confirm current rules for Deep Lake specifically before you fish — statewide defaults don't always apply to every lake, river, or stretch of coast.
Check current regulations for Deep Lake →Fishing License
Fishing in Washington is regulated by the Washington Department of Fish and Wildlife. 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 Washington fishing license →Before you cast a line, check:
- Size and bag limits for your target species on Deep Lake specifically
- Whether Deep 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)