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Castro ValleyEden Area Chamber of Commerce Serving Ashland Castro Valley Cherryland and San Lorenzo Welcome to the East Bays Eden Area The Castro ValleyEden Area Chamber of Commerce serves the communities of Ashland Castro Valley Cherryland and San Lorenzo. Comprising the Eden Area these communities offer rich and diverse opportunities to learn shop work play and live. Each community has a unique history and flair offering residents and visitors experiences to remember. Our Community Castro Valleys Sylvan Lake Chabot and worldclass Eden Medical Center are just a few minutes apart.