How far is it from San Ramon, CA to Castle Hill, CA?

The distance between San Ramon, CA and Castle Hill, CA is 21 km by road.

How long does it take to drive from San Ramon, CA to Castle Hill, CA?

The drive from San Ramon, CA to Castle Hill, CA takes approximately 25 min by car.

The fastest route from San Ramon, CA to Castle Hill, CA covers 21 km with a driving time of approximately 25 min.

Castle Hill, CA lies roughly to the north-west of San Ramon, CA.

Distance: 21 kmDrive time: 25 min

Driving from San Ramon, CA to Castle Hill, CA takes about 25 min via I 680. The distance is 21 km. The straight-line distance is 17 km. Driving directions

Driving directions14 · 21 km

The return trip from Castle Hill, CA to San Ramon, CA covers roughly the same distance, 21 km.

No notable attractions were found along this route.

Distance and drive time are computed from OpenStreetMap road data with the OSRM routing engine. Updated 6 October 2026.

How far is it from San Ramon, CA to Castle Hill, CA?: The distance between San Ramon, CA and Castle Hill, CA is 21 km by road.
How long does it take to drive from San Ramon, CA to Castle Hill, CA?: The drive from San Ramon, CA to Castle Hill, CA takes approximately 25 min by car.
What is the best route from San Ramon, CA to Castle Hill, CA?: The fastest route from San Ramon, CA to Castle Hill, CA covers 21 km with a driving time of approximately 25 min.
Which direction is Castle Hill, CA from San Ramon, CA?: Castle Hill, CA lies roughly to the north-west of San Ramon, CA.