Distance between cities › USA › California › Riverside, CA › Distance from Riverside to Altadena Book Hotels

Distance from Riverside, CA to Altadena, CA

Distance

51 mi

Time

1 hour 11 mins

Gas Cost

$8 - $15

There are 45.14 miles from Riverside to Altadena in northwest direction and 51 miles (82.08 kilometers) by car, following the I-210 route.

Riverside and Altadena are 1 hour 11 mins far apart, if you drive non-stop .

This is the fastest route from Riverside, CA to Altadena, CA. The halfway point is Phillips Ranch, CA.

Riverside, CA and Altadena, CA are in the same time zone (PDT). Current time in both locations is 1:23 pm.

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Lowest Price Rental Cars in Riverside, CA

Planning on renting a car to go from Riverside, CA to Altadena, CA? Here there are some offers to rent a car in Riverside, CA

Small

From $14

Intermediate

From $18

Full-size

From $24

SUVs

From $28

Vans

From $40

Compare rental car prices in Riverside »

Gas Consumption and Emissions

A car with a fuel efficiency of MPG will need 2.06 gallons of gas to cover the route between Riverside, CA and Altadena, CA.

The estimated cost of gas to go from Riverside to Altadena is $10.99.

During the route, an average car will release 40.37 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 $5.34 per gallon of regular gas. Price last updated on March 12, 2026.
Read more about our CO₂ calculation.

Halfway Point Between Riverside, CA and Altadena, CA

If you want to meet halfway between Riverside, CA and Altadena, CA or just make a stop in the middle of your trip, the exact coordinates of the halfway point of this route are 34.057777 and -117.785088, or 34º 3' 27.9972" N, 117º 47' 6.3168" W. This location is 25.65 miles away from Riverside, CA and Altadena, CA and it would take approximately 35 minutes to reach the halfway point from both locations.

Closest City or Town to Halfway Point

The closest town to the halfway point is Phillips Ranch, CA, situated 25 miles from Riverside, CA and 28 miles from Altadena, CA. It would take 29 minutes to go from Riverside to Phillips Ranch and 31 minutes to go from Altadena to Phillips Ranch.

Major City Closest to Halfway Point

The major city closest to the halfway point between Riverside, CA and Altadena, CA is Ontario, CA, situated 18 miles from Riverside, CA and 35 miles from Altadena, CA. It would take 23 minutes to go from Riverside to and 39 minutes to go from Altadena to Ontario.