How far is Riverside, CA from Mammoth Lakes, CA?
The driving distance from Riverside, CA to Mammoth Lakes, CA is about 302.5 miles (486.8 km), with a travel time of about 06h 05m by car.
- The straight-line flight distance is about 270.2 miles (434.8 km).
- For a round trip, plan for roughly 12h 11m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 6:00 AM to 7:30 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 06h 05m.
Starting early still helps, but most travelers will want a longer stop or an overnight stay on a route this long.
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.
Town in 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 Riverside and Mammoth Lakes.
Turn-by-Turn Driving Directions
Step-by-step road directions between Riverside and Mammoth Lakes.
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1
Start on the route
27 m · 8 sec
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2
Turn slight right onto Central Avenue
1.2 km · 2 min · Central Avenue
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3
Take the ramp left toward CA 91 East: San Bernardino
1454 ft · 37 sec
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4
Merge slight left onto Riverside Freeway
8.6 mi · 10 min · Riverside Freeway
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5
Continue on San Bernardino Freeway
5.5 mi · 6 min · San Bernardino Freeway
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6
Continue on Barstow Freeway
8.9 mi · 10 min · Barstow Freeway
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7
Keep slight left
1141 ft · 14 sec
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8
Continue on Barstow and Mojave Freeway
6.8 mi · 7 min · Barstow and Mojave Freeway
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9
Continue on CHP Officer Larry L. Wetterling and San Bernardino County Sheriff's Lieutenant Alfred E. Stewart Memorial Highway
5.4 mi · 6 min · CHP Officer Larry L. Wetterling and San Bernardino County Sheriff's Lieutenant Alfred E. Stewart Memorial Highway
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10
Continue on Barstow and Mojave Freeway
2.8 mi · 3 min · Barstow and Mojave Freeway
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11
Take the exit right toward US 395 North: Adelanto, Bishop
1549 ft · 38 sec
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12
Continue on US 395 North: Adelanto, Bishop
1.4 km · 2 min
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13
Continue on Blue Star Memorial Highway
66.7 mi · 1 hr 21 min · Blue Star Memorial Highway
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14
Continue on Red Mountain Road
1.5 km · 2 min · Red Mountain Road
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15
Continue on Blue Star Memorial Highway
36.7 mi · 43 min · Blue Star Memorial Highway
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16
Continue on Grand Army of the Republic Highway
56.1 mi · 1 hr 5 min · Grand Army of the Republic Highway
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17
Continue on South Main Street
2.2 mi · 5 min · South Main Street
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18
Continue on Grand Army of the Republic Highway
15 mi · 18 min · Grand Army of the Republic Highway
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19
Continue on South Edwards Street
1.1 km · 2 min · South Edwards Street
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20
Continue on Grand Army of the Republic Highway
26.1 mi · 31 min · Grand Army of the Republic Highway
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21
Continue on North Main Street
1317 ft · 32 sec · North Main Street
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22
Continue on Grand Army of the Republic Highway
7.4 mi · 9 min · Grand Army of the Republic Highway
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23
Continue on El Camino Sierra
5 mi · 6 min · El Camino Sierra
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24
Continue on South Main Street
2.4 mi · 4 min · South Main Street
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25
Turn left onto West Line Street
1.5 mi · 3 min · West Line Street
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26
Turn right onto North Barlow Lane
1 mi · 2 min · North Barlow Lane
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27
Turn left onto North Sierra Highway
36.4 mi · 43 min · North Sierra Highway
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28
Take the exit slight right
1278 ft · 19 sec
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29
Turn left
3.3 mi · 6 min
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30
Turn right
70 m · 19 sec
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31
Turn right
90 m · 22 sec
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32
Arrive at your destination
0 m · 1 sec
Car Route Details
A richer read on the saved driving route between Riverside and Mammoth Lakes.
Long-distance drive
This route is long enough that fuel, rest stops, weather, and timing matter more than any single maneuver.
Blue Star Memorial Highway
Continue on Blue Star Memorial Highway
66.7 mi · 01h 21m
Route Summary
A quick read on whether this route feels easy, ambitious, or worth planning around.
Better with a longer stop
This route is long enough that most travelers will be better off planning an overnight stay or a more deliberate stop window.
Mostly Sunny leaving Riverside and Mostly Sunny near Mammoth Lakes.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Riverside to Mammoth Lakes?
The road trip is about 302.5 miles (486.8 km) and usually takes 06h 05m in normal driving conditions.
Is this a same-day trip or an overnight route?
This route is long enough that most travelers will be better off planning an overnight stay or a more deliberate stop window.
What is the halfway point on this route?
Indian Wells is a useful midpoint, sitting about 151.4 miles from Riverside and 151.1 miles from Mammoth Lakes.
How much longer is the road route than the straight-line distance?
The direct path is about 270.2 miles (434.8 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 7:30 AM PDT. Starting early still helps, but most travelers will want a longer stop or an overnight stay on a route this long.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $61.56 one way or $123.11 round trip. Estimated CO2 is about 94.8 kg one way.
What should you check before leaving?
Before you leave, expect Mostly Sunny around Riverside and Mostly Sunny near Mammoth Lakes.
Stop Ideas Near Indian Wells
Useful break, food, and waypoint ideas within about 15 miles of the route midpoint.
Transit and Meeting Points
Useful pickup, handoff, or rendezvous points close to Indian Wells.
Mojave, California
Tehachapi, California
Bakersfield
Lancaster, California
Flight Path Map
This map shows the direct air route between Riverside and Mammoth Lakes. Straight-line distance: 270.14 mi (434.75 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 Mammoth Lakes
Town in Mono County, California, United States
| Population | 8,317 |
| Coordinates | 37.6485500, -118.9720800 |
| Altitude | 2402 |
| Country | United States |
End: Mammoth Lakes (-118.97208, 37.64855)
Estimated Travel Time
Distance: 487 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 10h 04m |
| 40 mph (64.37 km/h) | 07h 33m |
| 50 mph (80.47 km/h) | 06h 02m |
| 60 mph (96.56 km/h) | 05h 02m |
| 70 mph (112.65 km/h) | 04h 19m |
| 80 mph (129 km/h) | 03h 46m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $5.77 | $61.56 | $123.11 |
| Mid-grade | $6.07 | $64.72 | $129.45 |
| Premium | $6.24 | $66.61 | $133.23 |
| Diesel | $7.57 | $80.74 | $161.48 |
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 · May 22, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.