City of San Marcos - Descriptions and maps of San Marcos' 20 miles of existing trails. - http://www.ci.san-marcos.ca.us/
International Institute of Martial Arts - Family oriented martial arts school with classes in karate, kickboxing, and krav maga. IIMA holds over 50 world and national titles. - http://www.iimakarate.com
San Marcos Youth Soccer - Describes American Youth Soccer Organization (AYSO), Region 127, with contact information, games schedule, and clinics. - http://www.sanmarcosayso.org/