Approximately 36,000 catchable (>200 mm TL) rainbow trout Oncorhynchus mykiss are stocked annually into the Clinch River below Norris Lake, TN, but return rates of these fish are poor. Radio telemetry was used to monitor the movements and activity patterns of resident rainbow trout and rainbow trout recently-stocked into the Clinch River. Resident rainbow trout (N = 20) were collected from the river and implanted with radio transmitters. Hatchery rainbow trout (N = 20) were implanted with radio transmitters and stocked into the river two weeks after implantation. All rainbow trout were located at least once every two weeks during the summer of 1998. Stocked rainbow trout quickly dispersed; of 15 fish that were located 24 h post-stocking, seven moved upstream (mean displacement = 809 m) and eight moved downstream (mean displacement = 1855 m). Stocked rainbow trout disappeared rapidly; there were significantly fewer stocked rainbow trout remaining in the study area then resident rainbow trout 29 d post stocking. Differences in home range size and activity of the two groups were also documented.