This research represents the first year of a multi-year, baseline study to provide data on the population dynamics and habitat use of lamprey in Cedar Creek, a stream located with the CRB. The objectives of this research are to: 1- estimate the abundance of larval and adult lamprey and measure biological characteristics; 2- determine larval distribution and habitat use; 3- determine outmigrant timing of larvae and macropthalmia; 4- evaluate spawning habitat requirements; and 5- evaluate homing fidelity, survival rates, and ocean residence.