Aim of this study was to evaluate a standard ten-minute peer education protocol to reduce binge drinking among Dutch adolescents at campsites during summer holidays. Using a quasi-experimental design, we evaluated the effects of the peer education protocol as applied by trained peer educators. We collected data by telephone interviews fourteen days after the holiday. Peer education significantly increased knowledge on the risks of alcohol abuse and promoted personal reflection on alcohol intake. After peer education, adolescents had a more realistic view of their alcohol intake, more frequently perceived alcohol intake of their friends as binge drinking, and reported a higher intention to drink less alcohol in the future. Contrary to expectations, adolescents reported less self-efficacy to reduce alcohol use after peer education. (Contains 4 tables.)