ISD No. 281 Admin. Region: 4A 3733 Vera Cruz Ave N Crystal, MN 55422 Visit RiverTree School Website Schedule View Varsity Schedules Activities Director: Jessica Johnson 763-717-8067 Email me Activities Director: Rodney Nelson 763-717-8609 Email me Principal: Rodney Nelson Superintendent: Rodney Nelson Conference Affiliations: Eastern Minnesota Athletic Conference , Independent , Lake Conference , Lake Superior Conference , Mississippi 8 Conference , MN Christian Ath. Assn. , Northwest Suburban Conference , Pine to Prairie Conference , Suburban East Conference , Twin Cities Athletic Conference