Origin
Oakland, CA
Afternoon in Oakland on Sunday
Local time
12:50 PM
PDT
Current temp
46°F
Unavailable
Live forecast
Trip from Oakland, CA to Diamond Bar, CA
Drive Time
7h 22m
Distance
396.9 mi
639 km
Drive Score
8/10
Great drive
Same Day?
Yes, doable
Fuel Cost
$92
one way
Best Time to Leave
4 AM
7h 12m
★
6 AM
7h 22m
8 AM
7h 43m
10 AM
7h 29m
12 PM
7h 27m
3 PM
7h 31m
5 PM
7h 42m
8 PM
7h 16m
Estimated drive times based on typical traffic patterns. Actual times may vary with weather, construction, and real-time conditions.
Oakland, CA
Stephen Leonardi
Diamond Bar, CA
Lany-Jade Mondou
Trip Overview
Traveling from Oakland to Diamond Bar covers 396.9 miles, typically taking about 7 hours and 22 minutes of pure drive time. Because this route is almost entirely highway-focused, you can comfortably complete the journey in a single day if you stay focused. Expect to budget roughly $92 for fuel to make the trip between these two Pacific Coast locations. While the drive is straightforward, the long duration means it can be taxing, so plan for at least two deliberate stops to keep your energy levels up. It is a practical, direct transit route rather than a leisurely sightseeing tour, making it ideal for when you need to get from Northern to Southern California efficiently.
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
198.4 miles from Oakland, CA
A natural place for your longest stop of the day , about 3h 39m into the drive .
Drive Character
Expect a high-speed, interstate-heavy experience with 99% of your time spent on major highways like the Westside Freeway, I-5, and the Foothill Freeway. You will encounter a significant stretch of open road, specifically a 224.4-mile segment on the Westside Freeway that serves as the backbone of your journey. The personality of this drive is defined by its efficiency and consistent pace, prioritizing speed over technical or winding mountain passes. While the landscape remains wide and expansive for most of the trip, the transition onto the Foothill Freeway signals your arrival into the more densely populated Southern California road network. It is a classic, predictable interstate grind that demands steady focus.
Most of the miles stay on highways, which makes pacing and fuel planning easier than turn-by-turn city driving.
There are about 27 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 224.4 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 0.4 miles in near 11th Street.
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 396.9 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 0.4 miles (11th Street): Lane positioning matters here; at 10.9 miles: Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one; at 11.1 miles: Highway fork - watch signs carefully. Lane positioning matters here.
Critical Maneuvers
5 of 23 key pointsThese are the spots where you need to pay the most attention. Preview them before you drive.
7
0.4 mi into trip
|
~1m in
|
11th Street
Turn left onto 11th Street
Lane positioning matters here
Use the none / straight lanes.
8
10.9 mi into trip
|
~15m in
Take the exit toward I 238: Castro Valley, Stockton
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 31
Toward I 238: Castro Valley, Stockton
9
11.1 mi into trip
|
~15m in
Keep slight left at fork toward I 238: Stockton Fresno
Highway fork - watch signs carefully. Lane positioning matters here
Use the none / straight / slight right lanes.
Exit 31
Toward I 238: Stockton Fresno
7
345.1 mi into trip
|
~6h 20m 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
369.8 mi into trip
|
~6h 49m in
|
I 210 / Foothill Freeway
Keep slight right at fork onto I 210 / Foothill Freeway toward CA 134 West, I 210 East: San Bernardino, Ventura
Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one
Use the slight right lane.
Toward CA 134 West, I 210 East: San Bernardino,...
Towns Along This Route
On the drive from Oakland, CA to Diamond Bar, CA, road signs begin pointing toward Ventura along the way.
Ventura
369.8 mi in
|
~6h 49m
|
via I 210
Main Roads
| Road | Distance | Duration |
|---|---|---|
| Westside Freeway | 224.4 mi | 4h |
| I 5 Truck | 58.4 mi | 1h 6m |
| Foothill Freeway | 44 mi | 50m |
| Arthur H. Breed Junior Freeway | 30.2 mi | 34m |
| William Elton Brown Freeway | 17 mi | 18m |
| Nimitz Freeway | 9.7 mi | 11m |
| Orange Freeway | 6.3 mi | 7m |
| Golden State Freeway | 2 mi | 2m |
Longest stretch:
Westside Freeway
— 224.4 mi, about 4h
Turn-by-Turn Driving Directions
Step-by-step road directions between Oakland, CA and Diamond Bar, CA.
1
Start on 14th Street
0.2 mi
·
52 sec
·
14th Street
2
Turn right onto Harrison Street
0.2 mi
·
34 sec
·
Harrison Street
3
Turn left onto 11th Street
0.2 mi
·
25 sec
·
11th Street
Use the none / straight lanes.
4
Turn right onto Madison Street
0.3 mi
·
49 sec
·
Madison Street
Use the none lane.
5
Turn left onto 5th Street
381 ft
·
8 sec
·
5th Street
Use the left / straight lanes.
6
Take the ramp
0.2 mi
·
30 sec
Toward I 880 South: San Jose
Use the none lane.
7
Merge onto I 880
9.7 mi
·
11 min
·
Nimitz Freeway
Use the none / straight / slight right lanes.
8
Take the exit
0.2 mi
·
23 sec
Exit 31
Toward I 238: Castro Valley, Stockton
Use the straight / slight right lanes.
9
Keep slight left at fork
0.2 mi
·
22 sec
Exit 31
Toward I 238: Stockton Fresno
Use the none / straight / slight right lanes.
10
Continue on I 238
1.9 mi
·
2 min
·
Castro Valley Freeway
Exit 31
Toward I 238: Stockton Fresno
Use the none lane.
11
Continue on I 580
12 mi
·
14 min
·
Arthur H. Breed Junior Freeway
Exit 14
Use the none lane.
12
Keep slight right at fork onto I 580
18 mi
·
20 min
·
Arthur H. Breed Junior Freeway
Use the none lane.
13
Keep slight right at fork onto I 580
11 mi
·
11 min
·
William Elton Brown Freeway
14
Keep slight left at fork onto I 580
5.9 mi
·
6 min
·
William Elton Brown Freeway
15
Merge onto I 5
224 mi
·
4 hr
·
Westside Freeway
Use the none / straight / slight right lanes.
16
Keep slight right at fork onto I 5 Truck
58 mi
·
1 hr 6 min
·
I 5 Truck
Use the none / straight / slight right lanes.
17
Keep slight left at fork onto I 5
2.0 mi
·
2 min
·
Golden State Freeway
Use the none lane.
18
Take the exit
0.3 mi
·
17 sec
Exit 161A
Toward I 210 East: Pasadena
Use the slight right lane.
19
Continue on I 210
24 mi
·
28 min
·
Foothill Freeway
Use the none lane.
20
Keep slight right at fork onto I 210
19 mi
·
22 min
·
Foothill Freeway
Toward CA 134 West, I 210 East: San Bernardino, Ventura
Use the slight right lane.
21
Keep slight right at fork onto I 210
0.5 mi
·
32 sec
·
Foothill Freeway
Use the none lane.
22
Take the exit
0.9 mi
·
1 min
Exit 44A
Toward CA 57 South: Santa Ana
Use the slight right lane.
23
Continue on CA 57
6.3 mi
·
7 min
·
Orange Freeway
Use the none lane.
24
Take the exit
0.3 mi
·
40 sec
Exit 18
Toward Sunset Crossing Road
Use the straight / slight right lanes.
25
Turn left onto Sunset Crossing Road
0.1 mi
·
24 sec
·
Sunset Crossing Road
Use the left lane.
26
Turn left
39 ft
·
2 sec
27
Arrive at destination
Trip Plan
To manage the 7h 22m duration effectively, aim for an early morning departure to navigate through traffic zones before they peak. Since you are facing a long haul, space your two recommended stops evenly to avoid fatigue, particularly during the lengthy 224.4-mile Westside Freeway stretch. Keep an eye on your dashboard gauges as you navigate this high-speed corridor, as consistent highway speeds will impact your fuel consumption. Always check traffic reports before getting on the Foothill Freeway, as congestion can fluctuate significantly upon your approach to Diamond Bar. Being prepared for a long day behind the wheel is your best strategy for a smooth arrival.
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 198.4 miles from Oakland, CA, or about 3h 39m into the drive.
The longest continuous stretch on this route runs about 224.4 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 87 miles or 1h 39m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 198.4 miles or 3h 39m 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 11m
Traffic, exits, and arrival timing usually matter more near Diamond Bar, CA than in the middle of the route.
Before You Leave
+
Open the route before leaving Oakland, 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 Oakland, CA
This is one driving day of about 396.9 miles and 7h 22m.
Your first comfortable stop window is around 87 miles from Oakland, 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 224.4 miles.
Where to Stop
Rest stops, refuel points, and overnight suggestions along this route.
Halfway Point
Midpoint
About 198.4 mi from Oakland, CA · 3h 39m into the drive
Mid-route town
Meal stop
198 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 87 miles helps settle the day before fatigue starts building.
Meal break
The midpoint is around 198.4 miles from Oakland, 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 224.4 miles.
Arriving in Diamond Bar, CA
The final approach into Diamond Bar, 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 Diamond Bar, 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
$91.91 one way
$183.82 round trip
$5.88/gal
25.4 MPG avg
139 kg CO2
| Fuel Type | $/gal | One Way | Round Trip |
|---|---|---|---|
| midgrade | $6.07 | $94.79 | $189.57 |
| premium | $6.24 | $97.55 | $195.11 |
| diesel | $5.64 | $88.18 | $176.35 |
No toll roads detected on this route.
Estimated Trip Cost (one way, 1 person)
Fuel
$92
Meals
$25–$50
Total
$117–$142
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 138.9 kg one way. Prices: EIA weekly data, 2026-04-06.
Driving Electric?
About $42 in charging · 1 stop · 67% less CO2
| Vehicle Type | kWh | Stops | DC Fast | Home Charge |
|---|---|---|---|---|
| Average EV | 119.1 | 1 | $41.67 | $19.05 |
| Efficient EV | 99.2 | 1 | $34.73 | $15.88 |
| EV Truck/SUV | 158.8 | 1 | $55.57 | $25.40 |
Gas CO2
139 kg
EV CO2
46 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.
Destination
Diamond Bar, CA
Afternoon in Diamond Bar on Sunday
Local time
12:50 PM
PDT
Current temp
53°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
7 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
7h 22m 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 Oakland, CA to Diamond Bar, CA covers 396.9 miles and takes about 7h 22m without stops. Add 15-30 minutes for a fuel or rest stop on longer drives.
The main roads are Westside Freeway, I 5 Truck, Foothill Freeway. Most of the drive stays on highways, so watch for ramps and exits.
This is a comfortable same-day trip.
The midpoint is about 198.4 miles from Oakland, CA. Look for rest areas, gas stations, or food options near the halfway mark.
At current regular gas prices, expect to spend about $91.91 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 2 meaningful breaks 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 396.9 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 0.4 miles (11th Street): Lane positioning matters here; at 10.9 miles: Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one; at 11.1 miles: Highway fork - watch signs carefully. Lane positioning matters here.
On the drive from Oakland, CA to Diamond Bar, CA, road signs begin pointing toward Ventura along the way.
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