How far is Riverside, CA from Los Osos, CA?
The driving distance from Riverside, CA to Los Osos, CA is about 249 miles (400.7 km), with a travel time of about 05h 09m by car.
- The straight-line flight distance is about 216.7 miles (348.7 km).
- For a round trip, plan for roughly 10h 18m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 6:00 AM to 8:00 AM PDT.
Reverse, save, or send this route
This drive is better planned with a longer stop or an overnight stay. Copy the route link, send it to another device, or print a clean version before you head out.
This drive is better planned with a longer stop or an overnight stay.
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 05h 09m.
An early departure helps you fit a real stop into the day without turning the return into a late-night drive.
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 most populous city in Ventura County, California.
Route Weather Snapshot
Check the forecast at both ends before you head out.
Sunny
Driving Route Map
The map below follows the saved road route between Riverside and Los Osos.
Turn-by-Turn Driving Directions
Step-by-step road directions between Riverside and Los Osos.
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1
Start on the route
55 m · 14 sec
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2
Turn right
29 m · 7 sec
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3
Turn right onto Magnolia Avenue
70 m · 15 sec · Magnolia Avenue
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4
Turn left onto Central Avenue
3.5 mi · 6 min · Central Avenue
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5
Turn right onto Van Buren Boulevard
6.1 mi · 8 min · Van Buren Boulevard
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6
Continue on Mission Boulevard
1434 ft · 24 sec · Mission Boulevard
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7
Take the ramp slight left toward CA 60 West
1617 ft · 41 sec
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8
Merge slight left onto Pomona Freeway
12.1 mi · 14 min · Pomona Freeway
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9
Take the exit slight right toward CA 71 South, CA 71 North: Corona, Pomona
1213 ft · 30 sec
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10
Keep slight right to continue on CA 71 North: Pomona
2510 ft · 1 min
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11
Keep slight left
811 ft · 20 sec
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12
Merge slight left onto Chino Valley Freeway
3.5 mi · 4 min · Chino Valley Freeway
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13
Keep slight left to continue on CA 57 North
1.2 km · 2 min
-
14
Continue straight
3.4 mi · 4 min
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15
Keep slight left to continue on I 210 West: Pasadena
1.1 mi · 2 min
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16
Merge slight left onto Foothill Freeway
18.3 mi · 21 min · Foothill Freeway
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17
Keep slight left to continue on Ventura Freeway
6.4 mi · 7 min · Ventura Freeway
-
18
Keep slight right to continue on Ventura Freeway
1.1 mi · 1 min · Ventura Freeway
-
19
Keep slight right to continue on Ventura Freeway
2776 ft · 36 sec · Ventura Freeway
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20
Take the exit slight right toward I 5: Golden State Freeway, Los Angeles, Sacramento
1862 ft · 24 sec
-
21
Keep slight right to continue on I 5 North, CA 134 West: Golden State Freeway, Sacramento, Ventura Freeway, Ventura, Zoo Drive
98 m · 4 sec
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22
Keep slight right to continue on CA 134 West: Ventura Freeway, Ventura, Zoo Drive
1317 ft · 17 sec
-
23
Keep slight left to continue on CA 134: Ventura
715 ft · 9 sec
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24
Merge slight left onto Ventura Freeway
1 km · 44 sec · Ventura Freeway
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25
Keep slight right to continue on Ventura Freeway
1.9 mi · 2 min · Ventura Freeway
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26
Keep slight right to continue on Ventura Freeway
1.2 km · 53 sec · Ventura Freeway
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27
Keep slight right to continue on Ventura Freeway
54.7 mi · 1 hr 3 min · Ventura Freeway
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28
Keep slight left
18.5 mi · 21 min
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29
Continue on El Camino Real
16.4 mi · 19 min · El Camino Real
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30
Take the exit slight right toward CA 154: State Street, Cachuma Lake
1127 ft · 29 sec
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31
Continue on Calle Real
1672 ft · 40 sec · Calle Real
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32
Turn right onto Chumash Highway
23.9 mi · 33 min · Chumash Highway
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33
Enter the roundabout and take exit 2 toward Chumash Highway
35 m · 2 sec · Chumash Highway
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34
Exit the roundabout onto Chumash Highway
2.2 mi · 3 min · Chumash Highway
-
35
Enter the roundabout and take exit 2 toward Chumash Highway
43 m · 2 sec · Chumash Highway
-
36
Exit the roundabout onto Chumash Highway
6.3 mi · 10 min · Chumash Highway
-
37
Take the ramp right toward US 101 North
1138 ft · 31 sec
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38
Merge slight left
53.1 mi · 1 hr 1 min
-
39
Take the exit slight right toward Los Osos Valley Road
1421 ft · 39 sec
-
40
Turn left onto Los Osos Valley Road
10.3 mi · 16 min · Los Osos Valley Road
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41
Continue on Los Osos Valley Road
83 m · 14 sec · Los Osos Valley Road
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42
Arrive at your destination
0 m · 1 sec · Los Osos Valley Road
Car Route Details
A richer read on the saved driving route between Riverside and Los Osos.
Highway-focused drive
Most of the mileage stays on named highways, so the important moments are ramps, exits, merges, and the final local approach.
Ventura Freeway
Keep slight right to continue on Ventura Freeway
54.7 mi · 01h 03m
Route Summary
A quick read on whether this route feels easy, ambitious, or worth planning around.
A longer out-and-back drive
This is still possible in one day, but it becomes a long driving day. Leaving early and planning your stop window matters more here.
Sunny leaving Riverside and Sunny near Los Osos.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Riverside to Los Osos?
The road trip is about 249 miles (400.7 km) and usually takes 05h 09m in normal driving conditions.
Is this a same-day trip or an overnight route?
This is still possible in one day, but it becomes a long driving day. Leaving early and planning your stop window matters more here.
What is the halfway point on this route?
Ventura is a useful midpoint, sitting about 124.4 miles from Riverside and 124.6 miles from Los Osos.
How much longer is the road route than the straight-line distance?
The direct path is about 216.7 miles (348.7 km), while the road route adds roughly 32.3 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 6:00 AM to 8:00 AM PDT. If you want a more comfortable same-day return, try to leave by 6:42 AM PDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $54.97 one way or $109.94 round trip. Estimated CO2 is about 78 kg one way.
What should you check before leaving?
Before you leave, expect Sunny around Riverside and Sunny near Los Osos.
Stop Ideas Near Ventura
Useful break, food, and waypoint ideas within about 15 miles of the route midpoint.
Best Western Plus Carpinteria Inn
Ventura City Hall (formerly the Ventura County Courthouse - California Historical Landmark #847)
San Buenaventura City Hall
Oxnard Public Works Department
Transit and Meeting Points
Useful pickup, handoff, or rendezvous points close to Ventura.
Ventura
Oxnard Transportation Center
Santa Paula, California
Carpinteria station
Flight Path Map
This map shows the direct air route between Riverside and Los Osos. Straight-line distance: 216.69 mi (348.73 km).
#1 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 |
#2 Los Osos
Located along California's Central Coast in San Luis Obispo County at an elevation of 131 feet, this community is positioned on the southern shore of the Morro Bay estuary.
| Population | 0 |
| Coordinates | 35.3110900, -120.8324000 |
| Altitude | 40 |
| Country | United States |
End: Los Osos (-120.8324, 35.31109)
Estimated Travel Time
Distance: 401 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 08h 17m |
| 40 mph (64.37 km/h) | 06h 13m |
| 50 mph (80.47 km/h) | 04h 58m |
| 60 mph (96.56 km/h) | 04h 08m |
| 70 mph (112.65 km/h) | 03h 33m |
| 80 mph (129 km/h) | 03h 06m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $6.26 | $54.97 | $109.94 |
| Mid-grade | $6.50 | $57.06 | $114.12 |
| Premium | $6.69 | $58.73 | $117.46 |
| Diesel | $8.41 | $73.87 | $147.73 |
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 · Oct 15, 2026