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Keystone Harbor Fishing Regulations
What to check before fishing at Fort Casey State Park in Island County, Washington.
Fishing at Keystone Harbor
Fort Casey State Park provides access to Keystone Harbor, a public body in Island County, Washington. Species-specific size and bag limits can vary by water body and change seasonally, so always confirm current rules for Keystone Harbor specifically before you fish — statewide defaults don't always apply to every lake, river, or stretch of coast.
Check current regulations for Keystone Harbor →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 Keystone Harbor specifically
- Whether Keystone Harbor 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)