To quote Bruce Brown in his book "Mountain In The Clouds: A Search For The Wild Salmon".........


"Like Quinalt, the word Satsop originally referred to a river, a tribe of indians, and a prized run of salmon. Known as tsa' tsap, these steelhead and spring chinook (the term appears to have referred to both) were famous on nearby Puget Sound, where pioneering icthyologist George Suckley observed in in 1848: "The Puget Sound indians take a salmon in summer which is known to the....bands speaking the Nisqually dialect as satsup. This they considered to be the best of all kinds of salmon they catch"

Kind of a nebulous description near the end of the passage....were the Puget Sound tribes applying the label to locally caught fish or were they fishing the Satsop itself?. Regardless, it mentions a damn fine quality salmon coming from the Satsop. Doubt the label would apply to Fall fish.

I share this from the book as another piece of evidence to suggest the Satsop historically had a spring chinook run.