Peninsula Builders Exchange: A not for profit association serving Contractors, Designers and Owners in San Mateo County, California, since 1945.
San Carlos / Belmont Mother's Club: Support, education and friendship for local moms, and playgroups.
San Carlos California AYSO: San Carlos American Youth Soccer Organization. Includes schedules, volunteer information, contacts, playing fields and current standings.
San Carlos Chamber of Commerce: Information and directory of member businesses.
San Carlos Tennis Club: A tennis club for juniors, adults or teams. Includes playing fields and current standings.