The best city between SFO and Castro Valley, CA to meet is Foster City, California which is about 3 miles from the exact midpoint.
The closest zip code to the midpoint is 94404.
The exact latitude and longitude coordinates are 37° 35' 40" N and 122° 13' 47" W.
The total driving distance from SFO to Castro Valley, CA is 28 miles or 45 kilometers.
Each person would then have to drive about 14 miles to meet in the middle.
It will take about 16 minutes for each driver to arrive at the meeting point.
For a flight, the straight line geographic midpoint coordinates are 37° 39' 22" N and 122° 13' 55" W.
Travelmath helps you figure out the midpoint between two locations based on the driving directions from each starting point. You can find the closest town that is an equal distance from two cities. Use this tool to determine the best city to meet, or to look for interesting stops along the way if you're planning a long road trip and you need to take a break or stay overnight. Search for hotels at the midpoint city to split up your drive, or explore other nearby cities and discover local towns on your trip. If you're meeting a friend halfway in-between, you can figure out how far each person has to drive and how long it will take to arrive at the center. Even if you're separated by water, you can still calculate the straight line geographic midpoint to determine the closest flight distance.