Valley Sierra SBDC Share: Business ServicesNon-Profit Organization Valley Sierra SBDC Visit Website 1625 I Street Modesto, CA 95354 (209) 422-6416 (209) 567-4955 (fax) Rep Info Map Whom to Contact Kurt Clark Phone: (209) 422-6416 Send an Email What's Nearby? Distance: 5 10 15 20 25 50 mi.