This study examined the long-term effects of participation in a half-day, low-element challenge course on the group functioning of members of college student organizations. Seventy-six participants completed measures of group cohesion, group effectiveness, and individual effectiveness within the group at four points in time: (a) one week prior to the course (baseline), (b) immediately prior to the course (pretest), (c) immediately following the course (posttest), (d) and two months after the course (follow-up). Results showed no change in group functioning from baseline to pretest, significant increases in group functioning from pretest to posttest, and a return to pretest levels of group functioning at follow-up. Implications of these results and ideas for extending the longevity of challenge course gains are discussed. (Contains 1 table.)