A true experimental design with 60 male probationers, ages 13-16, was used to evaluate the viability of an Ontario-based 21-day wilderness adventure program as an alternative for adjudicated juveniles placed on probation. Participants were randomly assigned to a control group and an experimental group. The experimental group was subdivided into 3 groups of 10 boys. The groups were matched on age, sex, frequency of prior offense, and various background characteristics. The Jesness Inventory and an adapted Piers-Harris Self-Esteem Measure were used in pre, post, and follow-up tests. Self-report data on recidivism, background characteristics, and behavioral and attitudinal changes were gathered from both groups. The three experimental groups were also evaluated by the staff. Data did not indicate a significant relationship between exposure to the program and subsequent attitudinal or behavioral changes. A noticeable, but not significant, difference was that the offenses committed by the recidivists tended to be fewer and of a less severe type for the experimental groups. Staff and parent reports recommended using the program as a supplement to probation, introducing a process evaluation, improving referral and screening procedures, and implementing some form of post structure for juveniles after they complete such a course. Appendixes include tests, evaluations, contracts, form letters, activity outlines, sample schedules, questionnaires, follow-up surveys, testing procedures, and written responses from parents. (CM)