Discover unexpected places to stop on a picturesque drive from Castro Valley to Sunnyvale in California. Explore Fremont, Niles Canyon Railway, and more.

Planning a trip from Castro Valley to Sunnyvale? Check out the cost and distance of possible routes via I-880 S, I-680 S, and I-580 W. Choose the cheapest option and enjoy your trip!

Discover the best routes and attractions between Castro Valley and Sunnyvale for a fun road trip in California. Choose from 3 routes and plan your stops with our recommendations.