A section of the Blackledge River, 1.7 miles long, was blocked off by weirs and fish traps and a total of 4,757 marked brook trout (Salvelinus fontinalis), brown trout (Salmo trutta), and rainbow trout (Salmo gairdnerii) were stocked in the experimental area in three plantings. Only a small number of the marked trout attempted to leave the area as indicated by the 46 fish taken in the traps. Subsequent recapture of these trout, which were tagged, indicated no inclination to move any great distance. The mortality of the marked trout after planting was slight during the period of observation, except in one planting where the brook and brown trout stocked showed advanced symptoms of furunculosis. The total catch of marked trout during the season of April 17 to August 31 was 3,446 trout taken by 3,152 anglers spending 9,746 hours on the stream. There was about an 80 per cent return of the available population from each planting and from each of the three species of trout planted. Of the 97 unmarked trout which were caught, only 23 were judged to be “wild” fish, the others being recently stocked trout which had moved into the area from adjoining waters before the weirs were in place. The distribution of the angling pressure was such that each planting was depleted within a few days. About three-fourths of the total catch of trout made from any one planting was taken within four days of the date of stocking. The population of brook trout was depleted most rapidly, that of brown trout most slowly, and rainbow trout were intermediate. Only 5 days of fishing were provided during the season where the catch per unit of effort approached 1 trout per hour or more. There was a high correlation between the population of trout in the stream and the catch per unit effort, except in the second planting of brown trout. The relationship between the available population and the catch per unit effort showed progressively higher yields for the same number of trout as the season advanced. Because of the rapid population depletion, in only one instance could possible differences in behavior between newly stocked trout and those from previous plantings be noted. The number of brown trout caught from the second planting showed no correlation with the fishing effort while brown trout caught from the first planting at the same time were closely related to the fishing effort. The distribution of each angler's catch indicated that under a limit of 15 fish about one-third of the total number of anglers accounted for three-fourths of the catch on the first few days of fishing following each planting.