Teams in the league included the Aberdeen Black Cats, Chehalis Gophers, Hoquiam Loggers, Centralia Pets, Montesano Farmers, Raymond Cougars, Tacoma Cubs, South Bend River Rats and Centralia Railroaders.
The 1910 league was organized at a meeting in Hoquiam, Washington on March 6, 1910, as a six–team circuit with a 21–week schedule.
[3] In July 1910, Montesano Farmers second baseman Otto Moore was struck on the head with a baseball pitched by Harold Cross.
[5] The league reduced to four teams in 1911 and 1912, folding during its final season.
The Centralia Pets and Chehalis Farmers won championships in those seasons.