SOUTH FORK STILLAGUAMISH -- SUMMER STEELHEAD
Escapement -- Unknown. Spawning escapement is not monitored for this stock.
Description -- Mid-January to mid-April spawning period. A distinct stock based on the geographical isolation of the spawning population upstream of Granite Falls in the South Fork Stillaguamish River. This stock originated from hatchery plants in the mid-1950s and is managed only to provide a harvest fishery and has no escapement objective.
Origin and Production Type -- Non-native stock sustained by wild production.

CANYON CREEK -- SUMMER STEELHEAD
Escapement -- Unknown. Spawning escapement is not monitored for this stock, nor has an escapement goal been identified.
Description -- A distinct stock based on the geographical isolation of the spawning population. This stock primarily uses the forks of Canyon Creek for spawning and early rearing. Spawning period is unknown but probably similar to other summer steelhead stocks (February through April).
Origin and Production Type -- Mixed-origin (from commingled native and non-native stocks and/or mating between native and non-native stocks) stock sustained by wild production.

EDIT: Due to the efforts of the WSC and other anti-harvest preservationist organizations the introduced South Fork Stillaguamish steelhead are no longer managed only to provide a harvest fishery.