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Trip from Altadena, CA to San Jose, CA

Last recalculated Apr 16, 2026

Drive Time

6h 26m

Distance

340.6 mi

548 km

Drive Score

8/10

Great drive

Same Day?

Yes, doable

Fuel Cost

$78

one way

EV Charging

Unknown

Best Time to Leave

Save up to 37 min
4 AM
6h 14m ★
6 AM
6h 26m
8 AM
6h 51m
10 AM
6h 35m
12 PM
6h 32m
3 PM
6h 36m
5 PM
6h 50m
8 PM
6h 19m

Estimated drive times based on typical traffic patterns. Actual times may vary with weather, construction, and real-time conditions.

Best Time Drive vs Fly
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census-designated place in Los Angeles County, California, United States

Altadena, CA

Wikimedia Commons

city and county seat of Santa Clara County, California, United States

San Jose, CA

Wikimedia Commons

Trip Overview

This 340.6-mile drive from Altadena, California, to San Jose, California, is designed for a single day of travel, taking approximately 6 hours and 26 minutes. You'll primarily be on highways, with 98% of the journey on major roads like the Westside Freeway, CA 152, and I 5 Truck. With a projected fuel cost of $78, this is a straightforward, highway-focused trip across California. Given its manageable duration, it’s perfectly suited for a one-day adventure, allowing you to reach your destination without needing an overnight stop. Both your starting and ending points are within the Pacific Coast region, keeping the scenery consistent.

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

170.3 miles from Altadena, CA

A natural place for your longest stop of the day , about 3h 12m into the drive .

Who Is This Route For?

Weekend Trip

Doable as a same-day drive at 6h 26m. Total distance: 340.6 miles.

Family Friendly

Moderate complexity with 1 natural rest stops along the way.

Solo Traveler

6h 26m drive, plan rest stops for pacing.

Drive Character

Expect a predominantly highway-focused experience on this route, covering 98% on major roadways. The longest uninterrupted stretch you'll encounter is 182.5 miles on the Westside Freeway, offering extended periods of consistent driving. While largely an interstate experience, the inclusion of CA 152 and I 5 Truck might introduce subtle shifts in the road's character. This drive is characterized by its efficiency, prioritizing getting you from point A to point B with minimal detours.

Most of the miles stay on highways, which makes pacing and fuel planning easier than turn-by-turn city driving.
There are about 28 navigation steps in the underlying route data, so the final approach matters more than the middle miles.
Westside Freeway is the longest continuous segment at about 182.5 miles.

How Hard Is This Drive?

This is a straightforward highway drive that stays mostly on Westside Freeway and CA 152. This route has several spots where lane changes, forks, or exits need your full attention. The trickiest moment comes around 84.9 miles in near I 5 / Westside Freeway.

Driving Effort 9/10

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 23 significant decision points across 340.6 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 84.9 miles (I 5 / Westside Freeway): Highway fork - watch signs carefully. Lane positioning matters here; at 328.7 miles (CA 85): Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one; at 333.9 miles: Exit ramp - move to the correct lane early. Lane positioning matters here.

Critical Maneuvers

5 of 23 key points

These are the spots where you need to pay the most attention. Preview them before you drive.

7
84.9 mi into trip | ~1h 40m in | I 5 / Westside Freeway

Keep slight right at fork onto I 5 / Westside Freeway toward I 5 North

Highway fork - watch signs carefully. Lane positioning matters here

Use the straight / slight right lanes. Toward I 5 North
9
328.7 mi into trip | ~6h 11m 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
7
333.9 mi into trip | ~6h 17m in

Take the exit toward CA 87 North: Downtown San Jose

Exit ramp - move to the correct lane early. Lane positioning matters here

Use the straight / slight right lanes. Exit 5A Toward CA 87 North: Downtown San Jose
8
339.4 mi into trip | ~6h 23m in

Keep slight left at fork toward CA 87 North: Santa Clara Street, Julian Street

Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one

Use the slight left lane. Toward CA 87 North: Santa Clara Street, Julian...
9
340.2 mi into trip | ~6h 25m in

Keep slight right at fork toward Julian Street

Highway fork - watch signs carefully. Lane positioning matters here

Use the straight / slight right lanes. Exit 6B Toward Julian Street

Towns Mentioned on Route Signs

Based on OSRM destination-sign hints, not a full list of every settlement the road passes.

On the drive from Altadena, CA to San Jose, CA, road signs begin pointing toward Hollister along the way.

Hollister

267.4 mi in | ~4h 56m

Main Roads

Road Distance Duration
Westside Freeway 182.5 mi 3h 15m
CA 152 41.1 mi 51m
I 5 Truck 37.1 mi 42m
Foothill Freeway 22.3 mi 25m
Golden State Freeway 22.3 mi 25m
South Valley Freeway 19.9 mi 22m
CA 85 5.2 mi 6m
Guadalupe Parkway 4.3 mi 5m
Longest stretch: Westside Freeway — 182.5 mi, about 3h 15m

Turn-by-Turn Driving Directions

Step-by-step road directions between Altadena, CA and San Jose, CA.

1

Start on North Lake Avenue

154 ft · 5 sec · North Lake Avenue
2

Turn left onto East Altadena Drive

0.6 mi · 1 min · East Altadena Drive
Use the left lane.
3

Turn left onto Marengo Avenue

0.7 mi · 1 min · Marengo Avenue
4

Turn right onto East Woodbury Road

1.3 mi · 2 min · East Woodbury Road
Use the right lane.
5

Turn left onto Windsor Avenue

0.1 mi · 17 sec · Windsor Avenue
6

Take the ramp

0.3 mi · 44 sec
Toward I 210 West: San Fernando
7

Merge onto I 210

22 mi · 25 min · Foothill Freeway
Use the straight / slight right lanes.
8

Keep slight right at fork

0.1 mi · 9 sec
Use the slight right lane.
9

Merge onto I 5 Truck

1.0 mi · 1 min · I 5 Truck
Exit 161A
10

Keep slight left at fork onto I 5 Truck

36 mi · 41 min · I 5 Truck
Use the straight / slight right lanes.
11

Keep slight left at fork onto I 5

22 mi · 25 min · Golden State Freeway
Use the straight / slight right lanes.
12

Keep slight right at fork onto I 5

183 mi · 3 hr 15 min · Westside Freeway
Toward I 5 North Use the straight / slight right lanes.
13

Take the exit

0.2 mi · 26 sec
Exit 403B Toward CA 152 West: Gilroy, Hollister, San Jose
14

Continue on CA 152; CA33

29 mi · 33 min · CA 152; CA33
Use the straight lane.
15

Keep slight right at fork onto CA 152

12 mi · 16 min · CA 152
16

Take the exit onto CA 152

0.5 mi · 1 min · CA 152
Toward US 101 North: San Jose
17

Merge onto US 101; CA 152

20 mi · 22 min · South Valley Freeway
Use the slight right lane.
18

Keep slight right at fork onto CA 85

5.2 mi · 6 min · CA 85
Exit 377B Toward CA 85 North: Cupertino, Mountain View Use the slight right lane.
19

Take the exit

0.6 mi · 51 sec
Exit 5A Toward CA 87 North: Downtown San Jose Use the straight / slight right lanes.
20

Continue on CA 87

4.3 mi · 5 min · Guadalupe Parkway
Use the straight / slight right lanes.
21

Continue on CA 87

0.4 mi · 29 sec · Guadalupe Freeway
Use the straight / slight right lanes.
22

Take the exit

0.2 mi · 19 sec
Exit 6 Toward CA 82 Use the straight / slight right lanes.
23

Keep slight left at fork

0.5 mi · 51 sec
Toward CA 87 North: Santa Clara Street, Julian Street Use the slight left lane.
24

Keep slight left at fork

0.3 mi · 35 sec
Toward CA 87 North Use the straight / slight right lanes.
25

Keep slight right at fork

0.2 mi · 26 sec
Exit 6B Toward Julian Street Use the straight / slight right lanes.
26

Turn right onto West Saint James Street

0.2 mi · 28 sec · West Saint James Street
Use the straight lane.
27

Turn left onto North Market Street

416 ft · 8 sec · North Market Street
28

Arrive at destination

North Market Street

Trip Plan

For this 6-hour, 26-minute drive, consider an early morning departure from Altadena to maximize daylight and avoid potential traffic. With only one recommended stop, you have flexibility in pacing your journey. Keep an eye on your fuel levels, especially during the 182.5-mile stretch on the Westside Freeway, as services can be spaced out. This route is best tackled in a single day, so plan for a steady pace. A good tip is to have your navigation set before you leave to ensure smooth transitions between the Westside Freeway, CA 152, and I 5 Truck.

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 1 meaningful break for fuel, food, and rest.
The halfway point lands around 170.3 miles from Altadena, CA, or about 3h 12m 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 75 miles or 1h 29m in

Use this first pause for coffee, a restroom break, and a quick traffic check ahead.

Halfway reset

Around 170.3 miles or 3h 12m in

This is the best place for your longest stop, a real meal, and a full fuel check.

Final approach

Final hour starts around 5h 12m

Traffic, exits, and arrival timing usually matter more near San Jose, CA than in the middle of the route.

Before You Leave

+

Open the route before leaving Altadena, 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.

Day 1

Settle into the route from Altadena, CA

This is one driving day of about 340.6 miles and 6h 26m.

Your first comfortable stop window is around 75 miles from Altadena, CA.
This route can stay practical as a one-day drive if traffic stays reasonable.
Plan about 1 real break 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.

Halfway Point

Midpoint

About 170.3 mi from Altadena, CA · 3h 12m into the drive

city in Kings County, California, United States

Mid-route town

Meal stop

Avenal, CA

170 mi into the route

Best for: Lunch, fuel, and a longer reset

This sits close to the middle of the route, so it works well for the longest stop of the day.

Pacing Suggestions

Santa Clarita, CA

Fuel and coffee

A short stop after about 80 miles helps settle the day before fatigue starts building.

Fresno, CA

Meal break

The midpoint is around 170.5 miles from Altadena, CA, which is a good place for a longer meal and fuel stop.

Arriving in San Jose, CA

The final approach into San Jose, CA usually feels slower than the middle of the drive, so avoid planning your tightest schedule at the very end.

Try to arrive with enough fuel left to skip an immediate station stop unless you already know the area around San Jose, CA.

After long uninterrupted mileage, take five minutes before the last urban segment to reset and refocus on exits, merges, and city traffic.

These stop ideas are pacing suggestions — the exact town or exit can change with traffic, hotel plans, and fuel range.

National Parks Near This Route

Worth a detour if your schedule allows.

Santa Monica Mountains National Recreation Area

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 23.5
View on nps.gov
César E. Chávez National Monument

César E. Chávez National Monument

National Monument

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 82.3
View on nps.gov

Park data from the National Park Service API. Alerts update every 2 hours.

Fuel & Cost

Regular Gas

$78.28 one way

$156.57 round trip

$5.84/gal 25.4 MPG avg 119 kg CO2
Fuel Type $/gal One Way Round Trip
midgrade $6.02 $80.67 $161.34
premium $6.18 $82.83 $165.66
diesel $5.61 $75.20 $150.40

No toll roads detected on this route.

Estimated Trip Cost (one way, 1 person)

Fuel

$78

Meals

$25–$50

Total

$103–$128

Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.

Estimated CO2 emission: 119.2 kg one way. Prices: EIA weekly data, 2026-04-13.

Driving Electric?

About $36 in charging · 1 stop · 66% less CO2

Vehicle Type kWh Stops DC Fast Home Charge
Average EV 102.2 1 $35.76 $16.35
Efficient EV 85.2 0 $29.80 $13.62
EV Truck/SUV 136.2 1 $47.68 $21.80

Gas CO2

119 kg

EV CO2

40 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 Apr 15, 2026

Origin

Altadena, CA

Afternoon in Altadena on Thursday

Local time

2:22 PM

PDT

Current temp

73°F

Unavailable

Live forecast

Destination

San Jose, CA

Afternoon in San Jose on Thursday

Local time

2:22 PM

PDT

Current temp

44°F

Unavailable

Live forecast

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

29 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

6h 26m 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.

Frequently Asked Questions

The drive from Altadena, CA to San Jose, CA covers 340.6 miles and takes about 6h 26m without stops. Add 15-30 minutes for a fuel or rest stop on longer drives.
The main roads are Westside Freeway, CA 152, I 5 Truck. Most of the drive stays on highways, so watch for ramps and exits.
This is a comfortable same-day trip.
The midpoint is about 170.3 miles from Altadena, CA. Look for rest areas, gas stations, or food options near the halfway mark.
At current regular gas prices, expect to spend about $78.28 one way. This estimate uses 25.4 MPG — your actual cost will vary with your vehicle's fuel efficiency and current gas prices.
Start early — leave by 6-7 AM to arrive at a reasonable hour. This is a long drive — plan for a morning departure or consider splitting it into two days.
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 23 significant decision points across 340.6 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.
The main spots that need attention: at 84.9 miles (I 5 / Westside Freeway): Highway fork - watch signs carefully. Lane positioning matters here; at 328.7 miles (CA 85): Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one; at 333.9 miles: Exit ramp - move to the correct lane early. Lane positioning matters here.
On the drive from Altadena, CA to San Jose, CA, road signs begin pointing toward Hollister along the way.

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