Coastal cutthroat trout were captured using one-pass electrofishing or with a hook and line. In sections MS1, T1, T2, and T3, up to ten fin clips and scale samples were taken from trout (>50 mm in length) in each 10 mm size class until 100 samples were collected or until sampling crews reached the end of trout distribution. At site MS0 and at all sites above barrier 3, fin clips were obtained from every captured trout and scale samples were collected from age 1+ fish. All sites were sampled during the summer of 2002 with the exception of MS0 and MS1.1 which were sampling during the spring of 2003. Fish were assigned to age classes based on length frequency analysis.