The drive from Los Alamos, CA to San Diego, CA covers 262.9 miles and takes about 5h 16m behind the wheel.
This route is realistic as a one-day drive if you keep your stops efficient.
The route leans on San Diego Freeway, Ventura Freeway, Chumash Highway for much of the mileage,
and the overall profile is highway-focused drive.
The longest uninterrupted segment is about 110 miles on San Diego Freeway.
At current regular gas prices, budget about $60.43 one way before food or hotel costs.
Trip Pace
Same-day drive is realistic
A same-day return is possible, but it will make for a full day on the road.
Break Rhythm
1 planned break
Plan on a short reset every 3 to 4 hours to stay fresh behind the wheel.
Midpoint
131.5 miles from Los Alamos, CA
A natural place for your longest stop of the day
, about 2h 42m into the drive
.
Who Is This Route For?
Weekend Trip
Doable as a same-day drive at 5h 16m. Total distance: 262.9 miles.
Family Friendly
Moderate complexity with 1 natural rest stops along the way.
Solo Traveler
5h 16m drive, comfortable solo distance.
First-Time Driver
Mostly highway driving (75%). Some complex stretches to watch for.
Drive Character
This is a 5h 16m highway drive covering 262.9 miles, with most of the trip on San Diego Freeway and Ventura Freeway. The longest continuous stretch is about 110 miles on San Diego Freeway.
Most of the miles stay on highways, which makes pacing and fuel planning easier than turn-by-turn city driving.
There are about 33 navigation steps in the underlying route data, so the final approach matters more than the middle miles.
San Diego Freeway is the longest continuous segment at about 110 miles.
How Hard Is This Drive?
This is a straightforward highway drive that stays mostly on San Diego Freeway and Ventura Freeway. This route has several spots where lane changes, forks, or exits need your full attention. The trickiest moment comes around 123.4 miles in.
Driving Effort10/10
High effort - long or complex enough to need steady focus all day
Balances navigation complexity with total wheel time.
This is a demanding drive. With 27 significant decision points across 262.9 miles, you will need to stay alert - especially through interchange areas and urban stretches. Consider splitting it into segments if you are not comfortable with fast highway navigation.
Where does it get tricky?
The main spots that need attention: at 123.4 miles: Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one; at 123.7 miles: Highway fork - watch signs carefully. Lane positioning matters here; at 176.4 miles (CA 73 / Corona Del Mar Freeway): Highway fork - watch signs carefully. Lane positioning matters here.
Critical Maneuvers
5 of 27 key points
These are the spots where you need to pay the most attention. Preview them before you drive.
9
123.4 mi into trip|~2h 32m in
Keep slight right at fork toward I 405 South: San Diego Freeway, Santa Monica
Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one
Use the slight right lane.
Toward I 405 South: San Diego Freeway, Santa Mo...
8
123.7 mi into trip|~2h 33m in
Keep slight left at fork toward I 405 South: San Diego Freeway
Highway fork - watch signs carefully. Lane positioning matters here
Use the straight / slight right lanes.
Toward I 405 South: San Diego Freeway
8
176.4 mi into trip|~3h 33m in|CA 73 / Corona Del Mar Freeway
Keep slight right at fork onto CA 73 / Corona Del Mar Freeway toward CA 73 South: San Diego
Highway fork - watch signs carefully. Lane positioning matters here
Use the straight / slight right lanes.
Exit 10
Toward CA 73 South: San Diego
8
190.7 mi into trip|~3h 50m in
Take the exit toward La Paz Road, Moulton Parkway
Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one
Use the straight / slight right lanes.
Exit 3
Toward La Paz Road, Moulton Parkway
8
262.1 mi into trip|~5h 13m in
Take the exit toward Front Street, Civic Center, 2nd Avenue
Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one
Use the straight / slight right lanes.
Exit 17
Toward Front Street, Civic Center, 2nd Avenue
Towns Mentioned on Route Signs
Based on OSRM destination-sign hints, not a full list of every settlement the road passes.
Between Los Alamos, CA and San Diego, CA, road signs point toward Santa Barbara and Santa Monica.
Santa Barbara
16.9 mi in|~23m|via CA 154
Santa Monica
123.3 mi in|~2h 32m
Main Roads
Road
Distance
Duration
San Diego Freeway
110 mi
2h 8m
Ventura Freeway
65.2 mi
1h 15m
Chumash Highway
32.6 mi
45m
El Camino Real
17 mi
19m
San Joaquin Hills Transportation Corridor
12.8 mi
14m
I 405
10.3 mi
11m
US 101
7.3 mi
8m
Corona Del Mar Freeway
4 mi
4m
Longest stretch:
San Diego Freeway
— 110 mi, about 2h 8m
Turn-by-Turn Driving Directions
Step-by-step road directions between Los Alamos, CA and San Diego, CA.
1
Start on Leslie Street
377 ft·22 sec·Leslie Street
2
Turn left onto CA 135
0.4 mi·33 sec·Bell Street
3
Turn left onto CA 135
218 ft·4 sec·Foxen Lane
4
Take the ramp
0.2 mi·32 sec
5
Merge onto US 101
7.3 mi·8 min·US 101
6
Take the exit
0.2 mi·38 sec
Toward CA 154: Los Olivos, Lake Cachuma
7
Turn left onto CA 154
6.4 mi·9 min·Chumash Highway
8
Enter roundabout onto CA 154
127 ft·2 sec·Chumash Highway
9
Continue on CA 154
2.2 mi·3 min·Chumash Highway
10
Enter roundabout onto CA 154
113 ft·2 sec·Chumash Highway
Toward CA 154 East: Cachuma Lake, Santa Barbara
11
Continue on CA 154
24 mi·32 min·Chumash Highway
Toward CA 154 East: Cachuma Lake, Santa BarbaraUse the straight lane.
12
Take the ramp
0.2 mi·32 sec
Toward US 101 SouthUse the slight left lane.
13
Merge onto US 101
17 mi·19 min·El Camino Real
Use the straight / slight right lanes.
14
Continue on US 101
65 mi·1 hr 15 min·Ventura Freeway
Use the straight / slight right lanes.
15
Take the exit
0.1 mi·18 sec
Toward I 405 North, I 405 South: Sacramento, Santa MonicaUse the straight / slight right lanes.
16
Keep slight right at fork
0.3 mi·38 sec
Toward I 405 South: San Diego Freeway, Santa MonicaUse the slight right lane.
17
Keep slight left at fork
0.1 mi·13 sec
Toward I 405 South: San Diego FreewayUse the straight / slight right lanes.
18
Merge onto I 405
13 mi·15 min·San Diego Freeway
Use the straight / slight right lanes.
19
Keep slight right at fork onto I 405
27 mi·30 min·San Diego Freeway
Use the straight / slight right lanes.
20
Keep slight right at fork onto I 405
2.3 mi·2 min·San Diego Freeway
Use the straight / slight right lanes.
21
Keep slight left at fork onto I 405
0.2 mi·11 sec·San Diego Freeway
Use the straight / right lanes.
22
Keep slight left at fork onto I 405
10 mi·11 min·I 405
Use the straight / slight right lanes.
23
Keep slight right at fork onto CA 73
4.0 mi·4 min·Corona Del Mar Freeway
Exit 10Toward CA 73 South: San DiegoUse the straight / slight right lanes.
Place data sourced from public business listings. Hours and availability may vary.
National Parks Near This Route
Worth a detour if your schedule allows.
Cabrillo National Monument
National Monument
In 1542, Juan Rodriguez Cabrillo climbed out of his boat and onto shore, becoming the first European to set foot on what is now the West Coast of the United States. Cabrillo National Monument not only...
5 mi from route
~13 min detour
$20
near mile 262.9
The Santa Monica Mountains offer easy access to surprisingly wild places. Experience the famous beaches of Malibu or explore more than 500 miles of trails. The park abounds with historical and cultura...
5 mi from route
~12 min detour
Free
near mile 108.8
Station data from NREL Alternative Fuel Stations database.
Driving Electric?
About $28 in charging
· 0 stops
· 66% less CO2
Vehicle Type
kWh
Stops
DC Fast
Home Charge
Average EV
78.9
0
$27.60
$12.62
Efficient EV
65.7
0
$23.00
$10.52
EV Truck/SUV
105.2
1
$36.81
$16.83
Gas CO2
92 kg
EV CO2
31 kg (66% less)
Plan for 0 charging stops, roughly every 270 miles. Allow 25-40 minutes per stop at a DC fast charger.
DC fast charging avg $0.35/kWh. Home charging avg $0.16/kWh. US grid CO2: 0.39 kg/kWh.
Travel Intel
Current conditions at both ends of the drive.
Forecast as of Apr 17, 2026
Origin
Los Alamos, CA
Morning
in Los Alamos on Friday
Local time
6:29 AM
PDT
Current temp
64°F
Unavailable
Live forecast
Destination
San Diego, CA
Morning
in San Diego on Friday
Local time
6:29 AM
PDT
Current temp
55°F
Partly Cloudy
SE 5 mph0% chanceLive forecast
Wind Advisory
Wind Advisory issued April 17 at 12:31AM PDT until April 17 at 5:00PM PDT by NWS Las Vegas NV
Wind Advisory
Wind Advisory issued April 17 at 12:31AM PDT until April 17 at 5:00AM PDT by NWS Las Vegas NV
Seasonal Notes
Summer travel usually means heavier construction, hotter rest stops, and busier weekend traffic around major cities.
Winter travel shortens daylight, so a route that looks manageable on paper can feel much longer after dark.
Holiday weekends tend to make both departure and arrival windows slower than the raw route time suggests.
Time zone
Same local time
Origin and destination are on the same clock, so arrival timing is easier to judge at a glance.
Temperature spread
9 degrees cooler at arrival
A meaningful temperature swing is a good cue to rethink layers, water, and how soon you want to arrive.
Road read
5h 16m on the road
An early start around 7-8 AM gets you there with plenty of daylight left.
Weather data from the National Weather Service. Conditions may change; check closer to your travel date.
Frequently Asked Questions
The drive from Los Alamos, CA to San Diego, CA covers 262.9 miles and takes about 5h 16m without stops. Add 15-30 minutes for a fuel or rest stop on longer drives.
The main roads are San Diego Freeway, Ventura Freeway, Chumash Highway. Most of the drive stays on highways, so watch for ramps and exits.
This is a comfortable same-day trip.
The midpoint is about 131.5 miles from Los Alamos, CA. Look for rest areas, gas stations, or food options near the halfway mark.
At current regular gas prices, expect to spend about $60.43 one way. This estimate uses 25.4 MPG — your actual cost will vary with your vehicle's fuel efficiency and current gas prices.
An early start around 7-8 AM gets you there with plenty of daylight left. A late afternoon start means arriving after dark. Morning is better.
Plan about 1 meaningful break for fuel, food, or rest. Plan on a short reset every 3 to 4 hours to stay fresh behind the wheel.
This is a demanding drive. With 27 significant decision points across 262.9 miles, you will need to stay alert - especially through interchange areas and urban stretches. Consider splitting it into segments if you are not comfortable with fast highway navigation.
The main spots that need attention: at 123.4 miles: Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one; at 123.7 miles: Highway fork - watch signs carefully. Lane positioning matters here; at 176.4 miles (CA 73 / Corona Del Mar Freeway): Highway fork - watch signs carefully. Lane positioning matters here.
Between Los Alamos, CA and San Diego, CA, road signs point toward Santa Barbara and Santa Monica.
Yes. Nearby national parks include Cabrillo National Monument and Santa Monica Mountains National Recreation Area.
How this page is built
Compiled and maintained by the Trip.ovh planning team at COD Solutions Oy (Helsinki). Each route is built from authoritative open government and mapping datasets rather than crowdsourced reviews. Distances and geometry come from
OSRM
over
OpenStreetMap.
Fuel cost uses
EIA
weekly regional averages.
EV charging comes from the
NREL Alternative Fuels
dataset.
National park proximity is from the
NPS API.
Pages are published only after passing our data-quality checks; our
methodology page
documents refresh cadence, editorial standards, and known limitations.
