Fontana, CA to Los Altos, CA is 398.3 miles and takes about 7h 34m via Westside Freeway, Foothill Freeway, and CA 152, with a fuel budget near $90 and enough daylight to finish in a day. This drive stays within California, connecting the Pacific Coast region to itself. It's a solid choice for a single-day trip, mostly consisting of highway driving. Plan for around 7.5 hours of wheels turning, not including any breaks you might take. Be prepared for a full day on the road to cover the nearly 400 miles.
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
2 planned breaks
Plan on a short reset every 3 to 4 hours to stay fresh behind the wheel.
Midpoint
199.1 miles from Fontana, CA
A natural place for your longest stop of the day
, about 3h 45m into the drive
.
Main Roads
Road
Distance
Duration
Westside Freeway
182.5 mi
3h 15m
Foothill Freeway
67.2 mi
1h 17m
CA 152
41.1 mi
51m
I 5 Truck
37.1 mi
42m
Golden State Freeway
22.3 mi
25m
South Valley Freeway
19.9 mi
22m
CA 85
18.4 mi
21m
Foothill Expressway
3.6 mi
6m
Longest stretch:
Westside Freeway
— 182.5 mi, about 3h 15m
Traffic on I-5
Hour-of-day weekday pattern from 138 FHWA count stations on your route.
Peak
2 PM
~1,524 veh/hr typical
· worst 2,324
Quietest
2 AM
~316 veh/hr
Peak-to-quiet ratio
4.8×
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 Fontana, CA and Los Altos, CA.
1
Start on Merrill Avenue
205 ft·6 sec·Merrill Avenue
2
Turn right onto Sierra Avenue
3.0 mi·4 min·Sierra Avenue
Use the left / straight lanes.
3
Take the ramp
0.3 mi·45 sec
Toward CA 210 WestUse the straight / slight right lanes.
4
Merge onto CA 210
15 mi·17 min·Foothill Freeway
Use the straight / slight right lanes.
5
Keep slight right at fork onto CA 210
1.2 mi·1 min·Foothill Freeway
Use the straight / slight right lanes.
6
Keep slight right at fork onto CA 210
2.4 mi·2 min·Foothill Freeway
Use the straight / slight right lanes.
7
Keep slight right at fork onto CA 210
1.4 mi·1 min·Foothill Freeway
Use the straight / slight right lanes.
8
Keep slight right at fork onto CA 210
1.8 mi·2 min·Foothill Freeway
Use the straight / slight right lanes.
9
Keep slight right at fork onto CA 210
20 mi·23 min·Foothill Freeway
Use the straight / slight right lanes.
10
Keep slight right at fork onto I 210
26 mi·29 min·Foothill Freeway
Exit 26AToward I 210 West: SacramentoUse the straight / slight right lanes.
11
Keep slight right at fork
0.1 mi·9 sec
Use the slight right lane.
12
Merge onto I 5 Truck
1.0 mi·1 min·I 5 Truck
Exit 161A
13
Keep slight left at fork onto I 5 Truck
36 mi·41 min·I 5 Truck
Use the straight / slight right lanes.
14
Keep slight left at fork onto I 5
22 mi·25 min·Golden State Freeway
Use the straight / slight right lanes.
15
Keep slight right at fork onto I 5
183 mi·3 hr 15 min·Westside Freeway
Toward I 5 NorthUse the straight / slight right lanes.
16
Take the exit
0.2 mi·26 sec
Exit 403BToward CA 152 West: Gilroy, Hollister, San Jose
17
Continue on CA 152; CA33
29 mi·33 min·CA 152; CA33
Use the straight lane.
18
Keep slight right at fork onto CA 152
12 mi·16 min·CA 152
19
Take the exit onto CA 152
0.5 mi·1 min·CA 152
Toward US 101 North: San Jose
20
Merge onto US 101; CA 152
20 mi·22 min·South Valley Freeway
Use the slight right lane.
21
Keep slight right at fork onto CA 85
18 mi·21 min·CA 85
Exit 377BToward CA 85 North: Cupertino, Mountain ViewUse the slight right lane.
22
Take the exit
0.5 mi·1 min
Exit 19Toward I 280 North, I 280 South: San Jose, San FranciscoUse the straight / slight right lanes.
23
Keep slight left at fork
0.6 mi·1 min
Toward I 280 North: San Francisco
24
Merge onto I 280
0.1 mi·10 sec·Junipero Serra Freeway
25
Take the exit
0.2 mi·24 sec
Exit 13Toward Foothill Expressway, Grant RoadUse the slight right lane.
26
Keep slight right at fork
238 ft·5 sec
Toward G5: Foothill Expressway, Grant RoadUse the right lane.
27
Merge onto CR G5
3.6 mi·6 min·Foothill Expressway
Use the left / straight lanes.
28
Turn slight right onto South San Antonio Road
0.8 mi·1 min·South San Antonio Road
29
Arrive at destination
North San Antonio Road
Trip Plan
Given the 7-hour driving time, leaving Fontana early in the morning, ideally before 7 AM, will help you avoid the worst of the traffic, especially as you approach the Los Angeles metropolitan area. You're planning for a single-day trip, so aim for your two planned stops to be relatively brief, perhaps for fuel and a quick meal. The nearly 400-mile distance is manageable in one go, but stretching your legs at least once is recommended. Keep an eye on your fuel, as the $90 budget is an estimate based on average prices; your actual cost could vary.
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.
You can normally do this drive in one day.
Plan roughly 2 meaningful breaks for fuel, food, and rest.
The halfway point lands around 199.1 miles from Fontana, CA, or about 3h 45m into the drive.
The longest continuous stretch on this route runs about 182.5 miles.
This is a comfortable same-day trip.
Departure
Before you leave
Start with fuel, water, and navigation already sorted so the first hour feels easy.
First stop
Around 88 miles or 1h 43m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 199.1 miles or 3h 45m in
This is the best place for your longest stop, a real meal, and a full fuel check.
Final approach
Final hour starts around 6h 16m
Traffic, exits, and arrival timing usually matter more near Los Altos, CA than in the middle of the route.
Before You Leave
+
Open the route before leaving Fontana, 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.
Day 1
Settle into the route from Fontana, CA
This is one driving day of about 398.3 miles and 7h 34m.
Your first comfortable stop window is around 88 miles from Fontana, CA.
This route can stay practical as a one-day drive if traffic stays reasonable.
Plan about 2 real breaks rather than only quick fuel stops.
The longest stretch is on Westside Freeway for about 182.5 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 25
5 decision points cluster between mile 45 and 393.8 — GPS handles the exact turns, but know they're coming. Your lane choice matters more than the turn itself.
8
45 mi into trip|~53m in|I 210 / Foothill Freeway
Keep slight right at fork onto I 210 / Foothill Freeway toward I 210 West: Sacramento
Highway fork - watch signs carefully. Lane positioning matters here
Use the straight / slight right lanes.
Exit 26A
Toward I 210 West: Sacramento
9
373.9 mi into trip|~7h 1m in|CA 85
Keep slight right at fork onto CA 85 toward CA 85 North: Cupertino, Mountain View
Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one
Use the slight right lane.
Exit 377B
Toward CA 85 North: Cupertino, Mountain View
8
392.3 mi into trip|~7h 22m in
Take the exit toward I 280 North, I 280 South: San Jose, San Francisco
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 19
Toward I 280 North, I 280 South: San Jose, San...
9
393.6 mi into trip|~7h 25m in
Take the exit toward Foothill Expressway, Grant Road
Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one
Use the slight right lane.
Exit 13
Toward Foothill Expressway, Grant Road
9
393.8 mi into trip|~7h 25m in
Keep slight right at fork toward G5: Foothill Expressway, Grant Road
Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one
Use the right lane.
Toward G5: Foothill Expressway, Grant Road
Fuel & Cost
Regular Gas
$83.33 one way
$166.66 round trip
$5.31/gal25.4 MPG avg139 kg CO2
Fuel Type
$/gal
One Way
Round Trip
midgrade
$5.52
$86.54
$173.09
premium
$5.67
$88.83
$177.67
diesel
$4.80
$75.21
$150.41
No toll roads detected on this route.
Estimated Trip Cost (one way, 1 person)
Fuel
$83
Meals
$25–$50
Total
$108–$133
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 139.4 kg one way.
Prices: EIA weekly data, 2026-07-13.
Driving Electric?
About $42 in charging
· 1 stop
· 66% less CO2
Vehicle Type
kWh
Stops
DC Fast
Home Charge
Average EV
119.5
1
$41.82
$19.12
Efficient EV
99.6
1
$34.85
$15.93
EV Truck/SUV
159.3
1
$55.76
$25.49
Gas CO2
139 kg
EV CO2
47 kg (66% 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 17, 2026
Origin
Fontana, CA
Late night
in Fontana on Tuesday
Local time
2:08 AM
PDT
Current temp
67°F
Mostly Clear
SW 0 to 10 mph3% chanceLive forecast
Heat Advisory
Heat Advisory issued July 16 at 12:00PM PDT until July 16 at 11:00PM PDT by NWS Hanford CA
Red Flag Warning
Red Flag Warning issued July 16 at 11:39AM PDT until July 17 at 8:00PM PDT by NWS Medford OR
Destination
Los Altos, CA
Late night
in Los Altos on Tuesday
Local time
2:08 AM
PDT
Current temp
56°F
Mostly Clear
W 3 to 8 mph1% chanceLive forecast
Heat Advisory
Heat Advisory issued July 16 at 12:00PM PDT until July 16 at 11:00PM PDT by NWS Hanford CA
Red Flag Warning
Red Flag Warning issued July 16 at 11:39AM PDT until July 17 at 8:00PM PDT by NWS Medford OR
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
11 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
7h 34m on the road
Start early — leave by 6-7 AM to arrive at a reasonable hour.
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.
Santa Monica Mountains National Recreation Area
National Recreation Area
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...
23 mi from route
~59 min detour
Free
near mile 68.7
Park Closure: Solstice Canyon Trail Weekday Closure for Repairs
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 137.3
Park data from the National Park Service API. Alerts update every 2 hours.
More Details
What kind of drive is this?
This drive is 99% highway, meaning you'll be on freeways for almost the entire 398.3 miles. The longest continuous stretch without a major road change is 182.5 miles, likely on the Westside Freeway. Expect a consistent cruising experience with frequent exits and entrances as you navigate through various populated areas. The transition to surface roads, if any, would be minimal and occur very late in the trip.
99% highway — fuel and pacing are the main things to plan.
29 navigation steps total — most of the decisions cluster near the start and finish.
Longest single stretch: 182.5 mi on Westside Freeway.
How Hard Is This Drive?
10/10
This is a straightforward highway drive that stays mostly on Westside Freeway and Foothill Freeway. This route has several spots where lane changes, forks, or exits need your full attention. The trickiest moment comes around 45 miles in near I 210 / Foothill Freeway.
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 25 significant decision points across 398.3 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 45 miles (I 210 / Foothill Freeway): Highway fork - watch signs carefully. Lane positioning matters here; at 373.9 miles (CA 85): Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one; at 392.3 miles: Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one.
Elevation Profile
Hilly terrain with moderate elevation changes
4,147 ft156 ft
Total Climb
4,483 ft
Total Descent
5,562 ft
Highest Point
4,147 ft
~113.8 mi in
Elevation Range
3,991 ft
Notable High Points
4,147 ft at ~113.8 miles+2,994 ft prominence
Towns Mentioned on Route Signs
Based on OSRM destination-sign hints, not a full list of every settlement the road passes.
Between Fontana, CA and Los Altos, CA, road signs point toward Hollister, San Jose and Mountain View.
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
Doable as a same-day drive at 7h 34m. Total distance: 398.3 miles.
Family Friendly
Moderate complexity with 2 natural rest stops along the way.
Solo Traveler
7h 34m drive, plan rest stops for pacing.
Frequently Asked Questions
The longest stretch is about 182.5 miles on Westside Freeway. The full list of main roads is in the Roads section above.
We did not find dedicated rest areas on this route. For a drive this long, plan bathroom and stretch breaks around gas stations, fast-food stops, or small-town downtowns — check the Nearby Places section for options.
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 Los Altos, 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. Dedicated rest areas are limited, so plan gas or food stops as your bathroom breaks.
The main spots that need attention: at 45 miles (I 210 / Foothill Freeway): Highway fork - watch signs carefully. Lane positioning matters here; at 373.9 miles (CA 85): Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one; at 392.3 miles: Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one.
Yes — 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 7.6 hours each way, a round trip means 15.1 hours of driving — that is an unsafe level of fatigue for most drivers. Plan at least one night at Los Altos, CA before the return drive.
