How far is San Marino, CA from Riverside, CA?
The driving distance from San Marino, CA to Riverside, CA is about 53.5 miles (86.1 km), with a travel time of about 01h 03m by car.
- The straight-line flight distance is about 42.3 miles (68.1 km).
- For a round trip, plan for roughly 02h 07m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 8:00 AM to 10:00 AM PDT.
Reverse, save, or send this route
This route works well as a day trip with time at the destination. Copy the route link, send it to another device, or print a clean version before you head out.
This route works well as a day trip with time at the destination.
Flight Distance
Driving Distance
Gas Cost Calculator
Leave and Arrive Planner
Pick a departure time to see your estimated arrival and same-day return window.
Drive time stays fixed at 01h 03m.
A morning start gives you useful time at the destination and keeps the return out of the late evening.
You are leaving earlier than the recommended window, which gives you extra margin for breaks and traffic.
Halfway Point
A useful midpoint for breaks, coffee, or meeting in the middle.
The sixth most populous city in Los Angeles County, California.
Route Weather Snapshot
Check the forecast at both ends before you head out.
Mostly Sunny
Mostly Sunny
Driving Route Map
The map below follows the saved road route between San Marino and Riverside.
Turn-by-Turn Driving Directions
Step-by-step road directions between San Marino and Riverside.
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1
Start on San Marino Avenue
1.1 mi · 3 min · San Marino Avenue
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2
Keep slight left to continue on North San Marino Avenue
1575 ft · 46 sec · North San Marino Avenue
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3
Turn slight left onto South San Marino Avenue
1629 ft · 49 sec · South San Marino Avenue
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4
Turn left onto Clary Avenue
91 m · 17 sec · Clary Avenue
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5
Turn right onto Del Mar Avenue
1306 ft · 51 sec · Del Mar Avenue
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6
Turn slight left onto Mission Road
1.2 km · 2 min · Mission Road
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7
Continue on Mission Drive
1842 ft · 42 sec · Mission Drive
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8
Turn right onto Walnut Grove Avenue
1.2 mi · 2 min · Walnut Grove Avenue
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9
Take the ramp slight right toward I 10 East: San Bernardino
51 m · 4 sec
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10
Continue on I 10 East: San Bernardino
630 ft · 15 sec
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11
Merge slight left onto San Bernardino Freeway
1.4 km · 1 min · San Bernardino Freeway
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12
Keep slight right to continue on San Bernardino Freeway
4.1 mi · 5 min · San Bernardino Freeway
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13
Keep slight right to continue on San Bernardino Freeway
1.1 mi · 1 min · San Bernardino Freeway
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14
Keep slight right to continue on San Bernardino Freeway
2.2 mi · 3 min · San Bernardino Freeway
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15
Keep slight right to continue on San Bernardino Freeway
2 mi · 2 min · San Bernardino Freeway
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16
Keep slight right to continue on San Bernardino Freeway
1.1 mi · 1 min · San Bernardino Freeway
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17
Keep slight right to continue on San Bernardino Freeway
1.5 mi · 2 min · San Bernardino Freeway
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18
Keep slight right to continue on San Bernardino Freeway
1.4 mi · 2 min · San Bernardino Freeway
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19
Keep slight right to continue on San Bernardino Freeway
1.6 mi · 2 min · San Bernardino Freeway
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20
Take the exit slight right toward CA 71 South: Corona
2640 ft · 1 min
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21
Keep slight left to continue on CA 71 South: Corona
1465 ft · 36 sec
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22
Continue on Chino Valley Freeway
3.1 mi · 4 min · Chino Valley Freeway
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23
Take the exit slight right toward CA 60 East: Riverside
1.4 mi · 3 min
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24
Merge slight left onto Pomona Freeway
12 mi · 14 min · Pomona Freeway
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25
Take the exit slight right toward Van Buren Boulevard, Etiwanda Avenue
2448 ft · 1 min
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26
Turn straight onto Mission Boulevard
852 ft · 15 sec · Mission Boulevard
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27
Continue on Van Buren Boulevard
6.1 mi · 9 min · Van Buren Boulevard
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28
Turn left onto Central Avenue
3.6 mi · 6 min · Central Avenue
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29
Turn sharp right
52 m · 13 sec
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30
Arrive at your destination
0 m · 1 sec
Car Route Details
A richer read on the saved driving route between San Marino and Riverside.
Highway-focused drive
Most of the mileage stays on named highways, so the important moments are ramps, exits, merges, and the final local approach.
Pomona Freeway
Merge slight left onto Pomona Freeway
12 mi · 00h 14m
Route Summary
A quick read on whether this route feels easy, ambitious, or worth planning around.
A comfortable day-trip route
This route works well as a day trip. You can leave in the morning, spend meaningful time at the destination, and still return the same day.
Mostly Sunny leaving San Marino and Mostly Sunny near Riverside.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from San Marino to Riverside?
The road trip is about 53.5 miles (86.1 km) and usually takes 01h 03m in normal driving conditions.
Is this a same-day trip or an overnight route?
This route works well as a day trip. You can leave in the morning, spend meaningful time at the destination, and still return the same day.
What is the halfway point on this route?
Pomona is a useful midpoint, sitting about 23.9 miles from San Marino and 29.6 miles from Riverside.
How much longer is the road route than the straight-line distance?
The direct path is about 42.3 miles (68.1 km), while the road route adds roughly 11.2 extra miles because roads do not follow the straight air line.
When is the best time to leave for this route?
A good departure window is usually 8:00 AM to 10:00 AM PDT. If you want a more comfortable same-day return, try to leave by 4:22 PM PDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $10.90 one way or $21.81 round trip. Estimated CO2 is about 16.8 kg one way.
What should you check before leaving?
Before you leave, expect Mostly Sunny around San Marino and Mostly Sunny near Riverside.
Stop Ideas Near Pomona
Useful break, food, and waypoint ideas within about 15 miles of the route midpoint.
Your Home Away From Home
Embassy Suites by Hilton Brea North Orange County
Chino City Hall
Cucamonga Sign Shop LLC
Transit and Meeting Points
Useful pickup, handoff, or rendezvous points close to Pomona.
Pomona station
Claremont, California
Ontario
Fullerton Transportation Center
Flight Path Map
This map shows the direct air route between San Marino and Riverside. Straight-line distance: 42.3 mi (68.07 km).
#1 San Marino
City in California, United States
| Population | 12,786 |
| Coordinates | 34.1214000, -118.1064600 |
| Altitude | 172 |
| Country | United States |
#2 Riverside
The most populous city in Riverside County, California and the center of the Riverside metropolitan area.
| Population | 330,786 |
| Coordinates | 33.9533500, -117.3961600 |
| Altitude | 252 |
| Country | United States |
End: (-117.396162, 33.953244)
Estimated Travel Time
Distance: 86 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 01h 46m |
| 40 mph (64.37 km/h) | 01h 20m |
| 50 mph (80.47 km/h) | 01h 04m |
| 60 mph (96.56 km/h) | 00h 53m |
| 70 mph (112.65 km/h) | 00h 45m |
| 80 mph (129 km/h) | 00h 40m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $5.77 | $10.90 | $21.81 |
| Mid-grade | $6.07 | $11.46 | $22.93 |
| Premium | $6.24 | $11.80 | $23.60 |
| Diesel | $7.57 | $14.30 | $28.60 |
Assumes 8.3 L/100 km (about 28.3 MPG). CO2 is an estimate and varies by vehicle, fuel blend, traffic, and terrain.
Prices in California · Apr 19, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.