The drive from Fremont, CA to Altadena, CA covers 356.3 miles and takes about 6h 45m behind the wheel.
This route is realistic as a one-day drive if you keep your stops efficient.
The route leans on Westside Freeway, I 5 Truck, Pacheco Pass Highway for much of the mileage,
and the overall profile is highway-focused drive.
The longest uninterrupted segment is about 181.1 miles on Westside Freeway.
At current regular gas prices, budget about $81.89 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
178.2 miles from Fremont, CA
A natural place for your longest stop of the day
, about 3h 24m into the drive
.
Fremont is a suburban city in the southern part of the East Bay of the San Francisco Bay Area; it is the 4th largest city in the Bay Area by population. Fremont is in the southern part of Alameda County, California, between Union City to the north, Sunol and the hills to the east, Milpitas and Santa Clara County to the south, and the San Francisco Bay to the west. The city of Newark, near the edge of the Bay, is surrounded by the city of Fremont.
Fremont industry is not particularly large relative to other parts of the Bay Area, but neither is it a bedroom community. Many people in Fremont work locally in the electronics and high-tech industry, while many others commute to Silicon Valley or San Francisco locations for work.
Top landmarks
•Mission San José — 18th-century Spanish mission in Fremont, California
•Ardenwood Historic Farm — human settlement in California, United States of America
•Niles Depot Museum — railway museum in Niles, California
Doable as a same-day drive at 6h 45m. Total distance: 356.3 miles.
Family Friendly
Moderate complexity with 1 natural rest stops along the way.
Solo Traveler
6h 45m drive, plan rest stops for pacing.
Drive Character
This is a 6h 45m highway drive covering 356.3 miles, with most of the trip on Westside Freeway and I 5 Truck. The longest continuous stretch is about 181.1 miles on Westside Freeway.
Most of the miles stay on highways, which makes pacing and fuel planning easier than turn-by-turn city driving.
There are about 24 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 181.1 miles.
How Hard Is This Drive?
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 1.6 miles in.
Driving Effort8/10
Demanding - plan breaks and stay ahead of the key maneuvers
Balances navigation complexity with total wheel time.
This is a demanding drive. With 17 significant decision points across 356.3 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 1.6 miles: Lane positioning matters here; at 15.2 miles: Exit ramp - move to the correct lane early. Lane positioning matters here; at 270.3 miles (I 5 Truck): Highway fork - watch signs carefully. Lane positioning matters here.
Critical Maneuvers
5 of 17 key points
These are the spots where you need to pay the most attention. Preview them before you drive.
6
1.6 mi into trip|~3m in
Take the ramp toward I 880 South: San Jose
Lane positioning matters here
Use the right lane.
Toward I 880 South: San Jose
7
15.2 mi into trip|~19m in
Take the exit toward US 101 South: Los Angeles
Exit ramp - move to the correct lane early. Lane positioning matters here
Use the straight / right lanes.
Toward US 101 South: Los Angeles
6
270.3 mi into trip|~5h 3m in|I 5 Truck
Keep slight right at fork onto I 5 Truck
Highway fork - watch signs carefully. Lane positioning matters here
Use the straight / slight right lanes.
7
330.7 mi into trip|~6h 12m in
Take the exit toward I 210 East: Pasadena
Exit ramp - move to the correct lane early. Lane positioning matters here
Use the slight right lane.
Exit 161A
Toward I 210 East: Pasadena
8
353.3 mi into trip|~6h 39m in
Take the exit toward Arroyo Boulevard, Windsor 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 22B
Toward Arroyo Boulevard, Windsor Avenue
Main Roads
Road
Distance
Duration
Westside Freeway
181.1 mi
3h 14m
I 5 Truck
58.4 mi
1h 6m
Pacheco Pass Highway
40.6 mi
50m
Bayshore Freeway
32.3 mi
37m
Foothill Freeway
22.3 mi
25m
Nimitz Freeway
13.3 mi
15m
Golden State Freeway
2 mi
2m
Mowry Avenue
1.6 mi
3m
Longest stretch:
Westside Freeway
— 181.1 mi, about 3h 14m
Turn-by-Turn Driving Directions
Step-by-step road directions between Fremont, CA and Altadena, CA.
1
Start on Mowry Avenue
109 ft·4 sec·Mowry Avenue
2
Continue on Mowry Avenue
1.4 mi·3 min·Mowry Avenue
Use the left lane.
3
Continue on Mowry Avenue
0.2 mi·23 sec·Mowry Avenue
4
Take the ramp
0.3 mi·40 sec
Toward I 880 South: San JoseUse the right lane.
5
Merge onto I 880
13 mi·15 min·Nimitz Freeway
Use the straight / slight right lanes.
6
Take the exit
0.1 mi·34 sec
Toward US 101 South: Los AngelesUse the straight / right lanes.
7
Merge onto US 101
32 mi·37 min·Bayshore Freeway
Use the straight / right lanes.
8
Take the exit onto CA 152
0.3 mi·39 sec·CA 152
Toward CA 152 East: 10th Street, Pacheco Pass Road
9
Turn left onto CA 152
353 ft·12 sec·East 10th Street
10
Continue on CA 152
41 mi·50 min·Pacheco Pass Highway
11
Take the exit
0.6 mi·1 min
Toward I 5: Los Angeles
12
Merge onto I 5
181 mi·3 hr 14 min·Westside Freeway
Use the straight / slight right lanes.
13
Keep slight right at fork onto I 5 Truck
58 mi·1 hr 6 min·I 5 Truck
Use the straight / slight right lanes.
14
Keep slight left at fork onto I 5
2.0 mi·2 min·Golden State Freeway
Use the straight / slight right lanes.
15
Take the exit
0.3 mi·17 sec
Exit 161AToward I 210 East: PasadenaUse the slight right lane.
16
Continue on I 210
22 mi·25 min·Foothill Freeway
Use the straight / slight right lanes.
17
Take the exit
0.2 mi·31 sec
Exit 22BToward Arroyo Boulevard, Windsor AvenueUse the straight / slight right lanes.
18
Turn left onto Arroyo Boulevard
426 ft·17 sec·Arroyo Boulevard
19
Continue on Windsor Avenue
522 ft·14 sec·Windsor Avenue
20
Turn right onto West Woodbury Road
1.3 mi·2 min·West Woodbury Road
Use the right lane.
21
Turn left onto North Marengo Avenue
0.7 mi·1 min·North Marengo Avenue
Use the left lane.
22
Turn right onto East Altadena Drive
0.6 mi·1 min·East Altadena Drive
23
Turn right onto North Lake Avenue
154 ft·3 sec·North Lake Avenue
24
Arrive at destination
North Lake Avenue
Trip Plan
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 178.2 miles from Fremont, CA, or about 3h 24m into the drive.
The longest continuous stretch on this route runs about 181.1 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 78 miles or 1h 35m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 178.2 miles or 3h 24m 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 33m
Traffic, exits, and arrival timing usually matter more near Altadena, CA than in the middle of the route.
Before You Leave
+
Open the route before leaving Fremont, 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 Fremont, CA
This is one driving day of about 356.3 miles and 6h 45m.
Your first comfortable stop window is around 78 miles from Fremont, 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 181.1 miles.
Where to Stop
Rest stops, refuel points, and overnight suggestions along this route.
Halfway Point
Midpoint
About 178.2 mi from Fremont, CA
· 3h 24m into the drive
Place data sourced from public business listings. Hours and availability may vary.
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
~57 min detour
Free
near mile 331.8
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...
27 mi from route
~67 min detour
Free
near mile 270.3
Established in 1988, San Francisco Maritime National Historical Park celebrates America’s maritime heritage on the Pacific Coast. Our 50-acre park has grown around Aquatic Park Cove, a protected area...
Park data from the National Park Service API. Alerts update every 2 hours.
Fuel & Cost
Regular Gas
$81.89 one way
$163.79 round trip
$5.84/gal25.4 MPG avg125 kg CO2
Fuel Type
$/gal
One Way
Round Trip
midgrade
$6.02
$84.39
$168.78
premium
$6.18
$86.65
$173.30
diesel
$5.61
$78.67
$157.33
No toll roads detected on this route.
Estimated Trip Cost (one way, 1 person)
Fuel
$82
Meals
$25–$50
Total
$107–$132
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 124.7 kg one way.
Prices: EIA weekly data, 2026-04-13.
Driving Electric?
About $37 in charging
· 1 stop
· 66% less CO2
Vehicle Type
kWh
Stops
DC Fast
Home Charge
Average EV
106.9
1
$37.41
$17.10
Efficient EV
89.1
1
$31.18
$14.25
EV Truck/SUV
142.5
1
$49.88
$22.80
Gas CO2
125 kg
EV CO2
42 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
Fremont, CA
Morning
in Fremont on Saturday
Local time
7:51 AM
PDT
Current temp
67°F
Unavailable
Live forecast
Destination
Altadena, CA
Morning
in Altadena on Saturday
Local time
7:51 AM
PDT
Current temp
73°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
6 degrees warmer at arrival
A meaningful temperature swing is a good cue to rethink layers, water, and how soon you want to arrive.
Road read
6h 45m 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 Fremont, CA to Altadena, CA covers 356.3 miles and takes about 6h 45m without stops. Add 15-30 minutes for a fuel or rest stop on longer drives.
The main roads are Westside Freeway, I 5 Truck, Pacheco Pass 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 178.2 miles from Fremont, CA. Look for rest areas, gas stations, or food options near the halfway mark.
At current regular gas prices, expect to spend about $81.89 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 17 significant decision points across 356.3 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.
The main spots that need attention: at 1.6 miles: Lane positioning matters here; at 15.2 miles: Exit ramp - move to the correct lane early. Lane positioning matters here; at 270.3 miles (I 5 Truck): Highway fork - watch signs carefully. Lane positioning matters here.
The route from Fremont, CA to Altadena, CA does not surface many named destination signs beyond the main corridor.
Yes. Nearby national parks include Santa Monica Mountains National Recreation Area, César E. Chávez National Monument and San Francisco Maritime National Historical Park.
How this page is built
Compiled by the Trip.ovh planning team at COD Solutions Oy from open government datasets — OSRM over OpenStreetMap for geometry, EIA for fuel prices, and NPS for national parks. See our methodology for refresh cadence and limitations.
