Pre-Register for an San Diego Orienteering event here. If you have any questions, please contact us. To register for the Junior Orienteering Series, go to: Junior Orienteering Series Registration SDO MEMBERS Email: Password: First time logging in?                    Forgot your password?              Problems signing in, Contact Us. NON-MEMBERS If you are not an SDO member and would like to participate in an event, click "Pre-Register". Home  |  Contact Us  |  Admin Log-In Member Log-In Schedule Of Events Meet Times & Fees Volunteer Register Registration List Locations