Los Altos to San Diego is 473.6 miles and takes about 9h 6m via Westside Freeway and I-5, with a fuel budget near $109 and enough daylight to finish in a day if you keep a steady pace. This drive predominantly sticks to major freeways as you head south along the Pacific Coast region of California. With a 90% highway share, expect a straightforward path for most of the trip, making it a good option if you want to get to your destination efficiently. It's a solid overnight trip if you prefer to break up the 9 hours of driving.
Trip Pace
Best split across 2 days
Treat the return leg as its own travel day rather than an afterthought.
Break Rhythm
2 planned breaks
Plan on a short reset every 3 to 4 hours to stay fresh behind the wheel.
Midpoint
236.8 miles from Los Altos, CA
A natural place for your longest stop of the day
, about 4h 29m into the drive
.
Main Roads
Road
Distance
Duration
Westside Freeway
181.1 mi
3h 14m
I 5 Truck
83.3 mi
1h 36m
San Diego Freeway
76.5 mi
1h 29m
Pacheco Pass Highway
40.6 mi
50m
Santa Ana Freeway
35 mi
40m
US 101
20.3 mi
23m
West Valley Freeway
18.1 mi
20m
Golden State Freeway
5.3 mi
6m
Longest stretch:
Westside Freeway
— 181.1 mi, about 3h 14m
Traffic on I-5
Hour-of-day weekday pattern from 436 FHWA count stations on your route.
Peak
2 PM
~4,000 veh/hr typical
· worst 4,903
Quietest
2 AM
~671 veh/hr
Peak-to-quiet ratio
6×
busier at peak than in the quiet hours
12a6anoon6p11p
Averaged across 44 weeks of 2023 FHWA Travel Monitoring Analysis System data. Weekday hours only (Mon–Fri).
Turn-by-Turn Driving Directions
Step-by-step road directions between Los Altos, CA and San Diego, CA.
1
Start on North San Antonio Road
0.1 mi·18 sec·North San Antonio Road
2
Continue on North San Antonio Road
0.9 mi·2 min·North San Antonio Road
Use the left lane.
3
Continue on CR G5
3.8 mi·6 min·Foothill Expressway
Use the left lane.
4
Take the exit
0.3 mi·40 sec
Toward I 280 South: San Jose
5
Turn slight left onto I 280
0.3 mi·24 sec·Junipero Serra Freeway
6
Take the exit
0.5 mi·59 sec
Exit 12BToward CA 85 South: GilroyUse the straight / slight right lanes.
7
Merge onto CA 85
18 mi·20 min·West Valley Freeway
Use the straight / slight right lanes.
8
Continue on CA 85
0.4 mi·27 sec·CA 85
Exit 1AToward US 101 South
9
Continue on US 101
20 mi·23 min·US 101
10
Take the exit onto CA 152
0.3 mi·39 sec·CA 152
Toward CA 152 East: 10th Street, Pacheco Pass Road
11
Turn left onto CA 152
353 ft·12 sec·East 10th Street
12
Continue on CA 152
41 mi·50 min·Pacheco Pass Highway
13
Take the exit
0.6 mi·1 min
Toward I 5: Los Angeles
14
Merge onto I 5
181 mi·3 hr 14 min·Westside Freeway
Use the straight / slight right lanes.
15
Keep slight right at fork onto I 5 Truck
58 mi·1 hr 6 min·I 5 Truck
Use the straight / slight right lanes.
16
Keep slight left at fork onto I 5
4.1 mi·4 min·Golden State Freeway
Use the straight / slight right lanes.
17
Keep slight right at fork onto I 5 Truck
0.3 mi·17 sec·I 5 Truck
Exit 158Toward I 405 SouthUse the straight / slight right lanes.
18
Keep slight left at fork onto I 5 Truck
25 mi·29 min·I 5 Truck
Use the straight / slight right lanes.
19
Keep slight left at fork onto I 5
1.3 mi·1 min·Golden State Freeway
Toward CA 60 East, I 5 South: Pomona, Soto Street, Santa AnaUse the slight left / straight lanes.
20
Merge onto I 5
26 mi·30 min·Santa Ana Freeway
Use the straight / slight right lanes.
21
Keep slight right at fork onto I 5
0.2 mi·16 sec·Santa Ana Freeway
Use the straight / slight right lanes.
22
Take the exit
0.8 mi·57 sec
Toward Broadway, Main Street, Santa AnaUse the straight / slight right lanes.
23
Keep slight left at fork
0.1 mi·10 sec
Use the straight / slight right lanes.
24
Keep slight left at fork
0.2 mi·12 sec
Toward I 5 South
25
Merge onto I 5
0.8 mi·54 sec·Santa Ana Freeway
26
Keep slight right at fork onto I 5
0.8 mi·52 sec·Santa Ana Freeway
27
Keep slight right at fork onto I 5
1.2 mi·1 min·Santa Ana Freeway
Use the straight / slight right lanes.
28
Take the exit
0.7 mi·1 min
Exit 102Toward Newport AvenueUse the slight right lane.
29
Turn right onto Newport Avenue
0.4 mi·44 sec·Newport Avenue
Use the right lane.
30
Turn left onto Walnut Avenue
2.2 mi·4 min·Walnut Avenue
31
Turn left onto Jamboree Road
0.5 mi·37 sec·Jamboree Road
Toward CA 261 Toll North: Jamboree Road, RiversideUse the left lane.
32
Take the exit
0.3 mi·21 sec
Toward I 5 South
33
Merge onto I 5
5.5 mi·6 min·Santa Ana Freeway
Use the straight / slight right lanes.
34
Keep slight left at fork onto I 5
0.8 mi·55 sec·Santa Ana Freeway
Use the straight / slight right lanes.
35
Merge onto I 5
76 mi·1 hr 29 min·San Diego Freeway
Use the straight / slight right lanes.
36
Take the exit
0.2 mi·28 sec
Exit 17Toward Front Street, Civic Center, 2nd AvenueUse the straight / slight right lanes.
37
Keep slight right at fork
0.1 mi·14 sec
Toward Front Street, Civic Center
38
Continue on Front Street
0.5 mi·1 min·Front Street
Use the straight / left lanes.
39
Arrive at destination
Front Street
Trip Plan
To make the most of this 9-hour drive, consider departing Los Altos early in the morning, ideally before 7 AM, to bypass the worst of the Bay Area commute. Given the distance and duration, splitting this into two days is recommended for a more relaxed experience. A good stopping point would be around the halfway mark, perhaps near the Grapevine area. Watch for fluctuating traffic patterns, especially as you approach and pass through major metropolitan areas. Ensure you have at least two fuel stops planned, as the longest stretch without a major exit is over 180 miles.
Morning Departure
Start early — leave by 6-7 AM to arrive at a reasonable hour.
Evening Departure
This is a long drive — plan for a morning departure or consider splitting it into two days.
This drive is better paced as a 2-day trip.
Plan roughly 2 meaningful breaks for fuel, food, and rest.
The halfway point lands around 236.8 miles from Los Altos, CA, or about 4h 29m into the drive.
The longest continuous stretch on this route runs about 181.1 miles.
Consider an overnight stop or starting very early.
Departure
Before you leave
Start with fuel, water, and navigation already sorted so the first hour feels easy.
First stop
Around 104 miles or 2h 7m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 236.8 miles or 4h 29m in
This is the best place for your longest stop, a real meal, and a full fuel check.
Overnight split
Day 1 wrap after about 236.8 miles or 4h 29m
Stop before fatigue turns the last few hours into a grind. You want day two to start fresh, not just resumed.
Final approach
Final hour starts around 7h 54m
Traffic, exits, and arrival timing usually matter more near San Diego, CA than in the middle of the route.
Before You Leave
+
Open the route before leaving Los Altos, CA so your first major turns are already loaded.
+
Leave with enough water and a charging cable within reach, not packed away.
+
Check your fuel range against the first long segment, especially if you are starting outside city service areas.
+
Pick one backup stop option before the midpoint in case traffic changes your pacing.
+
Treat this as a 2-day road trip and book the overnight stop before the busiest arrival window.
Day 1
Settle into the route from Los Altos, CA
Aim for roughly 237 miles and 4.6 hours of wheel time on this day.
Day 2
Finish the approach into San Diego, CA
Aim for roughly 237 miles and 4.6 hours of wheel time on this day.
Your first comfortable stop window is around 104 miles from Los Altos, CA.
This route usually feels better as a 2-day drive than as one long push.
Plan about 2 real breaks rather than only quick fuel stops.
The longest stretch is on Westside Freeway for about 181.1 miles.
Where to Stop
Rest stops, refuel points, and overnight suggestions along this route.
Place data sourced from public business listings. Hours and availability may vary.
Heads-up: tricky spots
5 of 31
5 decision points cluster between mile 5.5 and 472.8 — GPS handles the exact turns, but know they're coming. Your lane choice matters more than the turn itself.
7
5.5 mi into trip|~10m in
Take the exit toward CA 85 South: Gilroy
Exit ramp - move to the correct lane early. Lane positioning matters here
Use the straight / slight right lanes.
Exit 12B
Toward CA 85 South: Gilroy
8
329.8 mi into trip|~6h 13m in|I 5 Truck
Keep slight right at fork onto I 5 Truck toward I 405 South
Highway fork - watch signs carefully. Lane positioning matters here
Use the straight / slight right lanes.
Exit 158
Toward I 405 South
8
354.8 mi into trip|~6h 43m in|I 5 / Golden State Freeway
Keep slight left at fork onto I 5 / Golden State Freeway toward CA 60 East, I 5 South: Pomona, Soto Street, Santa Ana
Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one
Use the slight left / straight lanes.
Toward CA 60 East, I 5 South: Pomona, Soto Stre...
8
389.2 mi into trip|~7h 26m in|Jamboree Road
Turn left onto Jamboree Road toward CA 261 Toll North: Jamboree Road, Riverside
Lane positioning matters here. Multiple destination signs - pick the right one
Use the left lane.
Toward CA 261 Toll North: Jamboree Road, Rivers...
8
472.8 mi into trip|~9h 3m 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
Fuel & Cost
Regular Gas
$99.08 one way
$198.17 round trip
$5.31/gal25.4 MPG avg166 kg CO2
Fuel Type
$/gal
One Way
Round Trip
midgrade
$5.52
$102.91
$205.81
premium
$5.67
$105.63
$211.26
diesel
$4.80
$89.42
$178.85
No toll roads detected on this route.
Estimated Trip Cost (one way, 1 person)
Fuel
$99
Hotel (1n)
$80–$140
Meals
$50–$100
Total
$229–$339
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 165.7 kg one way.
Prices: EIA weekly data, 2026-07-13.
Driving Electric?
About $50 in charging
· 1 stop
· 67% less CO2
Vehicle Type
kWh
Stops
DC Fast
Home Charge
Average EV
142.1
1
$49.73
$22.73
Efficient EV
118.4
1
$41.44
$18.94
EV Truck/SUV
189.4
2
$66.30
$30.31
Gas CO2
166 kg
EV CO2
55 kg (67% less)
Plan for 1 charging stop. A 30-minute DC fast charge mid-route should be enough to complete the trip comfortably.
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 Jul 16, 2026
Origin
Los Altos, CA
Evening
in Los Altos on Monday
Local time
5:35 PM
PDT
Current temp
80°F
Sunny
WNW 10 mph0% chanceLive forecast
Special Weather Statement
Special Weather Statement issued July 16 at 4:05PM PDT by NWS San Diego CA
Extreme Heat Warning
Extreme Heat Warning issued July 16 at 1:29PM PDT until July 16 at 8:00PM PDT by NWS San Diego CA
Destination
San Diego, CA
Evening
in San Diego on Monday
Local time
5:35 PM
PDT
Current temp
80°F
Sunny
S 10 mph3% chanceLive forecast
Special Weather Statement
Special Weather Statement issued July 16 at 4:05PM PDT by NWS San Diego CA
Extreme Heat Warning
Extreme Heat Warning issued July 16 at 1:29PM PDT until July 16 at 8:00PM PDT by NWS San Diego CA
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.
For long drives, weather on day two can matter just as much as conditions at departure, so check the whole travel window rather than only the first day.
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
Very similar conditions
Both ends of the route are sitting at about the same temperature right now.
Road read
9h 6m on the road
This is long enough that the arrival forecast matters almost as much as departure conditions. Recheck both ends before you roll.
Weather data from the National Weather Service. Conditions may change; check closer to your travel date.
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 473.6
Park Closure: Cabrillo Will Be Open From 1pm-5pm on Memorial Day, May 25, 2026
Park Closure: Park Auditorium Closed Until Further Notice
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...
22 mi from route
~55 min detour
Free
near mile 326.6
Yes, we can! Widely recognized as the most important Latino leader in the United States during the twentieth century, Cesar Chavez led farm workers and supporters in the establishment of the country's...
28 mi from route
~70 min detour
Free
near mile 261.3
Park data from the National Park Service API. Alerts update every 2 hours.
More Details
What kind of drive is this?
This route is almost entirely highway, with 90% of the 473.6 miles spent on major freeways. You'll encounter a longest stretch of 181.1 miles on the Westside Freeway before transitioning. Expect frequent exits and merges as you navigate through various urban and suburban areas along the I-5 corridor. The sheer volume of traffic and exits can make this feel like a more demanding drive than its 'mostly highway' profile suggests.
90% highway — fuel and pacing are the main things to plan.
39 navigation steps total — most of the decisions cluster near the start and finish.
Longest single stretch: 181.1 mi on Westside Freeway.
How Hard Is This Drive?
10/10
This is a straightforward highway drive that stays mostly on Westside Freeway and I 5 Truck. This route has several spots where lane changes, forks, or exits need your full attention. The trickiest moment comes around 5.5 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 31 significant decision points across 473.6 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 5.5 miles: Exit ramp - move to the correct lane early. Lane positioning matters here; at 329.8 miles (I 5 Truck): Highway fork - watch signs carefully. Lane positioning matters here; at 354.8 miles (I 5 / Golden State Freeway): Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one.
Elevation Profile
Hilly terrain with moderate elevation changes
2,865 ft39 ft
Total Climb
3,935 ft
Total Descent
4,052 ft
Highest Point
2,865 ft
~304.5 mi in
Elevation Range
2,826 ft
Notable High Points
1,071 ft at ~67.7 miles+681 ft prominence
2,865 ft at ~304.5 miles+1,628 ft prominence
Towns Mentioned on Route Signs
Based on OSRM destination-sign hints, not a full list of every settlement the road passes.
Between Los Altos, CA and San Diego, CA, road signs point toward Santa Ana, Broadway and Riverside.
Los Altos is in Santa Clara County, in the South Bay region of the San Francisco Bay Area in California. The city means "The Heights" or "Foothills" in Spanish. It is mostly residential, but it does have several areas which could be considered 'business districts'.
Top landmarks
•Steve Jobs Garage — house in Los Altos, California
•Willard Griffin House and Carriage House — Carriage House in Los Altos, California, USA.
•Los Altos History Museum — museum in Los Altos, California
From balmy beaches with a laid-back attitude to a gleaming modern image, San Diego offers much for the tourist to enjoy. Situated on the Southern California seacoast, San Diego is the second largest city in the state, with 1.4 million residents (2020), and has long attracted travelers for its ideal climate, miles of beaches, and location on the Mexican border right across from Tijuana.
But there's much more here than surfer culture and a quick hop across the border. A rich maritime and military heritage lives on in San Diego, which is home to the Pacific Fleet of the United States Navy. The city has also become known for its part in the wildlife conservation movement, owing to the presence of the world-renowned San Diego Zoo and Safari Park and the Scripps Institution of Oceanography. Natural scenery abounds from rocky tidepools and seaside cliffs to desert hills and canyons inland.
Top landmarks
•Balboa Park — historic park in San Diego, California
•Cabrillo National Monument — National Monument of the United States and historic district
The longest stretch is about 181.1 miles on Westside Freeway. The full list of main roads is in the Roads section above.
Yes — a 2-day pace is more comfortable than one long haul. A sensible stopping point is after roughly 237 miles on day one.
Yes — we found about 33 rest areas or service plazas within a short detour of the route (from OpenStreetMap). See the Rest Stops tab under Nearby Places for locations and mile markers. Plan to stretch, use the bathroom, and top off fluids every 2–3 hours on longer drives.
It helps. This route has a higher-than-average number of complex decision points, which get harder in the dark. If the last hour of the trip is on surface roads or mountain grades, aim to arrive at San Diego, CA before sunset when you can. Check the Trip Plan for departure windows that land you in daylight.
Only with planning. This is a long drive for kids — consider splitting it into two days rather than pushing through. Plan at least 2 meaningful breaks. There are 33 rest areas along the route for bathroom stops.
The main spots that need attention: at 5.5 miles: Exit ramp - move to the correct lane early. Lane positioning matters here; at 329.8 miles (I 5 Truck): Highway fork - watch signs carefully. Lane positioning matters here; at 354.8 miles (I 5 / Golden State Freeway): Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one.
Yes — Cabrillo National Monument, Santa Monica Mountains National Recreation Area and César E. Chávez National Monument. See the National Parks section for detour distances and tips on detours.
Not recommended in a single day. At 9.1 hours each way, a round trip means 18.2 hours of driving — that is an unsafe level of fatigue for most drivers. Plan at least one night at San Diego, CA before the return drive.
