This paper presents the results of creel censuses being carried out on four major lakes in Oregon's Cascade Mountains. The study on one lake commenced in 1945 and on the other three in 1946. The fish population of one of the lakes, 130 acres in area, was removed by poison in 1941; all plantings of rainbow trout (Salmo gairdnerii) since that time can be identified in the catch. Two of the lakes of approximately 1,000 acres each are stocked annually with rainbow and eastern brook trout (Salvelinus fontinalis) and the fourth of approximately 3,000 acres is stocked annually with rainbow trout fry produced from an egg-taking station at the lake.