Distance between cities › USA › California › Keyes, CA › Distance from Keyes to Half Moon Bay Book Hotels

Distance from Keyes, CA to Half Moon Bay, CA

Distance

103 mi

Time

2 hours 11 mins

Gas Cost

$16 - $30

There are 83.23 miles from Keyes to Half Moon Bay in west direction and 103 miles (165.76 kilometers) by car, following the CA 99 route.

Keyes and Half Moon Bay are 2 hours 11 mins far apart, if you drive non-stop .

This is the fastest route from Keyes, CA to Half Moon Bay, CA. The halfway point is Livermore, CA.

Keyes, CA and Half Moon Bay, CA are in the same time zone (PDT). Current time in both locations is 6:52 am.

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Lowest Price Rental Cars in Keyes, CA

Planning on renting a car to go from Keyes, CA to Half Moon Bay, CA? Here there are some offers to rent a car in Keyes, CA

Small

From $14

Intermediate

From $18

Full-size

From $24

SUVs

From $28

Vans

From $40

Compare rental car prices in Keyes »

Gas Consumption and Emissions

A car with a fuel efficiency of MPG will need 4.13 gallons of gas to cover the route between Keyes, CA and Half Moon Bay, CA.

The estimated cost of gas to go from Keyes to Half Moon Bay is $21.87.

During the route, an average car will release 80.99 pounds of CO₂ to the atmosphere. The carbon footprint would be 0.79 pounds of CO₂ per mile.

Average USA gas price used for calculation is $5.29 per gallon of regular gas. Price last updated on March 11, 2026.
Read more about our CO₂ calculation.

Halfway Point Between Keyes, CA and Half Moon Bay, CA

If you want to meet halfway between Keyes, CA and Half Moon Bay, CA or just make a stop in the middle of your trip, the exact coordinates of the halfway point of this route are 37.719357 and -121.678780, or 37º 43' 9.6852" N, 121º 40' 43.608" W. This location is 51.47 miles away from Keyes, CA and Half Moon Bay, CA and it would take approximately 1 hour 5 mins to reach the halfway point from both locations.

Closest City or Town to Halfway Point

The closest city to the halfway point is Livermore, CA, situated 57 miles from Keyes, CA and 48 miles from Half Moon Bay, CA. It would take 59 minutes to go from Keyes to Livermore and 55 minutes to go from Half Moon Bay to Livermore.