Ninety-five male juvenile sex offenders in an adventure-based behavior management program (LEGACY) were matched with male juveniles in state treatment-as-usual and other specialized programs in the same state to determine program effectiveness (as measured by rearrest rates). The LEGACY program demonstrated significant treatment effectiveness on rearrest rates when compared with youth development centers and other specialized programs two and three years later. Overall, three-year rearrest rates for the most serious reoffenses for each of the placements were as follows: 34.8% for YDC, 32.6% for OSP, and 19% for LEGACY. (Contains 1 table.)