Origin
Diamond Bar, CA
Afternoon in Diamond Bar on Sunday
Local time
1:34 PM
PDT
Current temp
53°F
Unavailable
Live forecast
Trip from Diamond Bar, CA to San Jose, CA
Drive Time
6h 54m
Distance
366.7 mi
590 km
Drive Score
8/10
Great drive
Same Day?
Yes, doable
Fuel Cost
$85
one way
EV Charging
Loading...
station data
Best Time to Leave
4 AM
6h 43m
★
6 AM
6h 55m
8 AM
7h 18m
10 AM
7h 3m
12 PM
7h 0m
3 PM
7h 4m
5 PM
7h 17m
8 PM
6h 48m
Estimated drive times based on typical traffic patterns. Actual times may vary with weather, construction, and real-time conditions.
Diamond Bar, CA
Lany-Jade Mondou
San Jose, CA
Stephen Leonardi
Trip Overview
If you are planning to travel from Diamond Bar to San Jose, expect a 366.7-mile journey that typically takes about 6 hours and 54 minutes. This drive is designed as a single-day trip, making it an efficient way to transit between these two Southern and Northern California hubs. You should budget approximately $85 for fuel to cover the distance. Because you are staying entirely within the Pacific Coast region, the transition is relatively seamless. While it is a long haul, the route is straightforward enough that most drivers will find it manageable without needing an overnight stay. It serves as a practical, highway-focused connection for those looking to reach their destination quickly.
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
183.4 miles from Diamond Bar, CA
A natural place for your longest stop of the day , about 3h 26m into the drive .
Drive Character
Expect a trip defined by high-speed efficiency, as roughly 99% of your travel occurs on major highways. You will rely primarily on the Foothill Freeway, the Westside Freeway, and CA 152 to navigate the distance. The route features a significant 182.5-mile stretch on the Westside Freeway, which accounts for the bulk of the time spent behind the wheel. Because this is a highway-focused drive, the experience is consistent and fast-paced rather than technical. You will find that the road maintains a steady rhythm throughout the journey, allowing you to cover ground effectively while moving through the California landscape.
Most of the miles stay on highways, which makes pacing and fuel planning easier than turn-by-turn city driving.
There are about 29 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 Foothill Freeway. This route has several spots where lane changes, forks, or exits need your full attention. The trickiest moment comes around 6.5 miles in.
Route Complexity
9/10
High effort - long or complex enough to need steady focus all day
This is a demanding drive. With 23 significant decision points across 366.7 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 6.5 miles: Highway fork - watch signs carefully. Lane positioning matters here; at 25.9 miles (I 210 / Foothill Freeway): Highway fork - watch signs carefully. Lane positioning matters here; at 354.8 miles (CA 85): Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one.
Critical Maneuvers
5 of 23 key pointsThese are the spots where you need to pay the most attention. Preview them before you drive.
8
6.5 mi into trip
|
~8m in
Keep slight left at fork toward I 210 West: Pasadena
Highway fork - watch signs carefully. Lane positioning matters here
Use the none lane.
Exit 25C
Toward I 210 West: Pasadena
8
25.9 mi into trip
|
~31m 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
354.8 mi into trip
|
~6h 39m 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
365.6 mi into trip
|
~6h 52m 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
366.3 mi into trip
|
~6h 53m 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 Along This Route
On the drive from Diamond Bar, CA to San Jose, CA, road signs begin pointing toward Hollister along the way.
Hollister
293.5 mi in
|
~5h 24m
Main Roads
| Road | Distance | Duration |
|---|---|---|
| Westside Freeway | 182.5 mi | 3h 15m |
| Foothill Freeway | 43.9 mi | 50m |
| 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 |
| Orange Freeway | 6.1 mi | 7m |
| CA 85 | 5.2 mi | 6m |
Longest stretch:
Westside Freeway
— 182.5 mi, about 3h 15m
Turn-by-Turn Driving Directions
Step-by-step road directions between Diamond Bar, CA and San Jose, CA.
1
Start on this road
33 ft
·
4 sec
·
this road
2
Turn left
84 ft
·
8 sec
3
Turn right onto North Diamond Bar Boulevard
0.1 mi
·
19 sec
·
North Diamond Bar Boulevard
4
Take the ramp
0.2 mi
·
30 sec
Toward CA 57 North
Use the left lane.
5
Continue on CA 57
6.1 mi
·
7 min
·
Orange Freeway
Use the none / straight / slight right lanes.
6
Keep slight left at fork
1.1 mi
·
2 min
Exit 25C
Toward I 210 West: Pasadena
Use the none lane.
7
Merge onto I 210
18 mi
·
21 min
·
Foothill Freeway
Use the none lane.
8
Keep slight right at fork onto I 210
26 mi
·
29 min
·
Foothill Freeway
Exit 26A
Toward I 210 West: Sacramento
Use the straight / slight right lanes.
9
Keep slight right at fork
0.1 mi
·
9 sec
Use the slight right lane.
10
Merge onto I 5 Truck
1.0 mi
·
1 min
·
I 5 Truck
Exit 161A
11
Keep slight left at fork onto I 5 Truck
36 mi
·
41 min
·
I 5 Truck
Use the none / straight / slight right lanes.
12
Keep slight left at fork onto I 5
22 mi
·
25 min
·
Golden State Freeway
Use the none / straight / slight right lanes.
13
Keep slight right at fork onto I 5
183 mi
·
3 hr 15 min
·
Westside Freeway
Toward I 5 North
Use the none / straight / slight right lanes.
14
Take the exit
0.2 mi
·
26 sec
Exit 403B
Toward CA 152 West: Gilroy, Hollister, San Jose
15
Continue on CA 152; CA33
29 mi
·
33 min
·
CA 152; CA33
Use the none lane.
16
Keep slight right at fork onto CA 152
12 mi
·
16 min
·
CA 152
Use the none lane.
17
Take the exit onto CA 152
0.5 mi
·
1 min
·
CA 152
Toward US 101 North: San Jose
18
Merge onto US 101; CA 152
20 mi
·
22 min
·
South Valley Freeway
Use the none / slight right lanes.
19
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.
20
Take the exit
0.6 mi
·
51 sec
Exit 5A
Toward CA 87 North: Downtown San Jose
Use the straight / slight right lanes.
21
Continue on CA 87
4.3 mi
·
5 min
·
Guadalupe Parkway
Use the none / straight / slight right lanes.
22
Continue on CA 87
0.4 mi
·
29 sec
·
Guadalupe Freeway
Use the none / straight / slight right lanes.
23
Take the exit
0.2 mi
·
19 sec
Exit 6
Toward CA 82
Use the straight / slight right lanes.
24
Keep slight left at fork
0.5 mi
·
51 sec
Toward CA 87 North: Santa Clara Street, Julian Street
Use the slight left lane.
25
Keep slight left at fork
0.3 mi
·
35 sec
Toward CA 87 North
Use the none / straight / slight right lanes.
26
Keep slight right at fork
0.2 mi
·
26 sec
Exit 6B
Toward Julian Street
Use the straight / slight right lanes.
27
Turn right onto West Saint James Street
0.2 mi
·
28 sec
·
West Saint James Street
Use the none lane.
28
Turn left onto North Market Street
416 ft
·
8 sec
·
North Market Street
Use the none lane.
29
Arrive at destination
North Market Street
Trip Plan
To keep your drive smooth, plan for at least one dedicated stop to stretch your legs and refuel during the near 7-hour trek. Given the heavy reliance on interstates, departing early in the morning can help you avoid the worst of the traffic congestion common on these busy corridors. Since the fuel cost is estimated at $85, keep an eye on your gauge during that long 182.5-mile stretch on the Westside Freeway to ensure you don't run low in a remote area. Flexibility is your biggest advantage on a one-day trip like this, so don't hesitate to adjust your departure time to match local traffic patterns. Staying hydrated and switching drivers if possible will make the long highway miles feel much shorter.
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 183.4 miles from Diamond Bar, CA, or about 3h 26m 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 81 miles or 1h 35m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 183.4 miles or 3h 26m 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 40m
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 Diamond Bar, 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 Diamond Bar, CA
This is one driving day of about 366.7 miles and 6h 54m.
Your first comfortable stop window is around 81 miles from Diamond Bar, 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 183.4 mi from Diamond Bar, CA · 3h 26m into the drive
Mid-route town
Meal stop
183 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
Fuel and coffee
A short stop after about 81 miles helps settle the day before fatigue starts building.
Meal break
The midpoint is around 183.4 miles from Diamond Bar, CA, which is a good place for a longer meal and fuel stop.
Before the longest stretch
Fuel checkTop up before Westside Freeway if your tank is already low. That segment runs about 182.5 miles.
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.
Fuel & Cost
Regular Gas
$84.92 one way
$169.84 round trip
$5.88/gal
25.4 MPG avg
128 kg CO2
| Fuel Type | $/gal | One Way | Round Trip |
|---|---|---|---|
| midgrade | $6.07 | $87.57 | $175.15 |
| premium | $6.24 | $90.13 | $180.26 |
| diesel | $5.64 | $81.47 | $162.94 |
No toll roads detected on this route.
Estimated Trip Cost (one way, 1 person)
Fuel
$85
Meals
$25–$50
Total
$110–$135
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 128.3 kg one way. Prices: EIA weekly data, 2026-04-06.
Driving Electric?
About $39 in charging · 1 stop · 66% less CO2
| Vehicle Type | kWh | Stops | DC Fast | Home Charge |
|---|---|---|---|---|
| Average EV | 110 | 1 | $38.50 | $17.60 |
| Efficient EV | 91.7 | 1 | $32.09 | $14.67 |
| EV Truck/SUV | 146.7 | 1 | $51.34 | $23.47 |
Gas CO2
128 kg
EV CO2
43 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.
Destination
San Jose, CA
Afternoon in San Jose on Sunday
Local time
1:34 PM
PDT
Current temp
71°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
18 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 54m 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 Diamond Bar, CA to San Jose, CA covers 366.7 miles and takes about 6h 54m without stops. Add 15-30 minutes for a fuel or rest stop on longer drives.
The main roads are Westside Freeway, Foothill Freeway, CA 152. Most of the drive stays on highways, so watch for ramps and exits.
This is a comfortable same-day trip.
The midpoint is about 183.4 miles from Diamond Bar, CA. Look for rest areas, gas stations, or food options near the halfway mark.
At current regular gas prices, expect to spend about $84.92 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 366.7 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 6.5 miles: Highway fork - watch signs carefully. Lane positioning matters here; at 25.9 miles (I 210 / Foothill Freeway): Highway fork - watch signs carefully. Lane positioning matters here; at 354.8 miles (CA 85): Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one.
On the drive from Diamond Bar, CA to San Jose, CA, road signs begin pointing toward Hollister along the way.
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