Business and Economy
Real Estate, Academy of Equestrian Arts, B.A. Morrison, BayAir.Net, Castro Valley Chamber of Commerce, Chouinard Winery, Clyde Robin Seeds, Cull Canyon Ranch, Kay's Bridal Boutique, LeTip of Castro Valley, Murtaugh CAD/CAM Inc.
Education
School Libraries, Castro Valley Adult School, Castro Valley Educational Foundation, Castro Valley Unified School District, Independent Elementary School, Nasatir School of Percussion, Redwood Christian Schools, Turnkey Construction Management Institute
Health
Carolyn Langer, D.D.S., Castro Valley Dental Care, JazzWithJan.com, M. S. Murphy, DDS, R. Scott Anderson, D.M.D., Shervin K. Yazdi, D.D.S., Victor R. Kvikstad, D.D.S
Society and Culture
Castro Valley Links, Castro Valley Rotary Club, Jenny Lin Foundation, Joy In Him Christian Fellowship, Inc., Neighborhood Church of Castro Valley
Castro Valley Local News: Topix.net
Local, regional, and statewide news collected from diverse sources on the web.
Castro Valley Online
Contains a map of the town and links to member sites.
Lake Chabot
Site dedicated to preserving the natural beauty of Anthony Chabot Regional Park includes information about the lake, rare plants, and preservation activities.
LouSan Bed and Breakfast
Luxury lodgings serve breakfasts from "Treasures from Our Mothers' Kitchens." Rooms, rates, and directions.
MyCastroValley.com
Community portal featuring a history of the town, message boards, news, and a directory of businesses, schools, and local government offices.