Origin
Diamond Bar, CA
Afternoon in Diamond Bar on Sunday
Local time
12:50 PM
PDT
Current temp
53°F
Unavailable
Live forecast
Trip from Diamond Bar, CA to Oakland, CA
Drive Time
7h 21m
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 11m
★
6 AM
7h 21m
8 AM
7h 42m
10 AM
7h 29m
12 PM
7h 27m
3 PM
7h 30m
5 PM
7h 41m
8 PM
7h 15m
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
Oakland, CA
Stephen Leonardi
Trip Overview
Stretching 396.9 miles from Diamond Bar to Oakland, this route connects two major hubs within the Pacific Coast region. You should plan for a driving time of approximately 7 hours and 21 minutes, making it a manageable, albeit long, day trip for most travelers. With 99% of your journey spent on highways, the drive is highly efficient and straightforward. Budgeting around $92 for fuel is a smart move to keep your finances in check before you head out. While it can be tackled in a single day, breaking the trip up with two planned stops will help you stay alert behind the wheel. Ultimately, this is a practical transit route designed for those who want to reach Northern California from Southern California as directly as possible.
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
198.5 miles from Diamond Bar, CA
A natural place for your longest stop of the day , about 3h 43m into the drive .
Drive Character
Expect a focused, highway-centric experience where 99% of your time is spent on major transit corridors like the Westside Freeway, the Foothill Freeway, and I-5 Truck. The route is defined by its efficiency, featuring a significant 225.6-mile uninterrupted stretch along the Westside Freeway. Because this is a high-speed transit route, you won't encounter technical local roads or winding back-country passes. Instead, you are looking at a consistent interstate grind that requires steady focus rather than complex navigation. The personality of this drive is utilitarian, prioritizing speed and connectivity as you transition between the southern and northern portions of the state.
Most of the miles stay on highways, which makes pacing and fuel planning easier than turn-by-turn city driving.
There are about 26 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 225.6 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 0.1 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 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 0.1 miles: Lane positioning matters here; 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.
Critical Maneuvers
5 of 23 key pointsThese are the spots where you need to pay the most attention. Preview them before you drive.
7
0.1 mi into trip
|
~0m in
Take the ramp toward CA 57 North
Lane positioning matters here
Use the left lane.
Toward CA 57 North
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
8
383.2 mi into trip
|
~7h 3m in
|
I 238 / Castro Valley Freeway
Keep slight left at fork onto I 238 / Castro Valley Freeway toward I 238
Highway fork - watch signs carefully. Lane positioning matters here
Use the slight left / slight right lanes.
Exit 34
Toward I 238
8
395.8 mi into trip
|
~7h 17m in
Take the exit toward Oak Street, Lakeside Drive
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 41A
Toward Oak Street, Lakeside Drive
Towns Along This Route
On the drive from Diamond Bar, CA to Oakland, CA, road signs begin pointing toward San Francisco along the way.
San Francisco
336.6 mi in
|
~6h 11m
|
via I 580
Main Roads
| Road | Distance | Duration |
|---|---|---|
| Westside Freeway | 225.6 mi | 4h 1m |
| Foothill Freeway | 43.9 mi | 50m |
| I 5 Truck | 37.1 mi | 42m |
| Arthur H. Breed Junior Freeway | 29.6 mi | 34m |
| Golden State Freeway | 22.3 mi | 25m |
| William Elton Brown Freeway | 17 mi | 18m |
| Nimitz Freeway | 9.8 mi | 11m |
| Orange Freeway | 6.1 mi | 7m |
Longest stretch:
Westside Freeway
— 225.6 mi, about 4h 1m
Turn-by-Turn Driving Directions
Step-by-step road directions between Diamond Bar, CA and Oakland, 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
226 mi
·
4 hr 1 min
·
Westside Freeway
Toward I 5 North
Use the none / straight / slight right lanes.
14
Keep slight left at fork onto I 580
16 mi
·
17 min
·
William Elton Brown Freeway
Toward I 580 West: Tracy, San Francisco
15
Keep slight right at fork onto I 580 Bypass
1.1 mi
·
1 min
·
William Elton Brown Freeway
16
Merge onto I 580
18 mi
·
20 min
·
Arthur H. Breed Junior Freeway
Use the none / straight / slight right lanes.
17
Keep slight right at fork onto I 580
12 mi
·
13 min
·
Arthur H. Breed Junior Freeway
Use the none lane.
18
Keep slight left at fork onto I 238
2.4 mi
·
2 min
·
Castro Valley Freeway
Exit 34
Toward I 238
Use the slight left / slight right lanes.
19
Keep slight left at fork
0.4 mi
·
52 sec
Toward I 880 North
Use the none / straight / slight right lanes.
20
Merge onto I 880
9.8 mi
·
11 min
·
Nimitz Freeway
Use the none lane.
21
Take the exit
0.2 mi
·
32 sec
Exit 41A
Toward Oak Street, Lakeside Drive
Use the straight / slight right lanes.
22
Turn right onto Oak Street
0.3 mi
·
49 sec
·
Oak Street
Use the straight / right lanes.
23
Turn left onto 12th Street
0.3 mi
·
45 sec
·
12th Street
Use the none / straight lanes.
24
Turn right onto Harrison Street
0.1 mi
·
24 sec
·
Harrison Street
Use the right lane.
25
Turn left onto 14th Street
0.2 mi
·
48 sec
·
14th Street
26
Arrive at destination
14th Street
Trip Plan
To make the most of your 7-hour and 21-minute journey, aim to depart early in the morning to avoid peak congestion near your starting point. Incorporating at least two stops into your itinerary is essential for maintaining energy levels during such a long stint on the highway. Since the route relies heavily on major freeways, keep an eye on traffic reports for the I-5 corridor, as these high-traffic arteries can experience sudden delays. Given the $92 fuel estimate, consider topping off your tank before leaving Diamond Bar to ensure you aren't forced into high-priced stops mid-route. Flexibility is your best asset here, so don't hesitate to extend your two planned breaks if the 225.6-mile stretch on the Westside Freeway begins to wear on you.
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 198.5 miles from Diamond Bar, CA, or about 3h 43m into the drive.
The longest continuous stretch on this route runs about 225.6 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 42m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 198.5 miles or 3h 43m 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 Oakland, 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.
+
Pick one backup stop option before the midpoint in case traffic changes your pacing.
Day 1
Settle into the route from Diamond Bar, CA
This is one driving day of about 396.9 miles and 7h 21m.
Your first comfortable stop window is around 87 miles from Diamond Bar, 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 225.6 miles.
Where to Stop
Rest stops, refuel points, and overnight suggestions along this route.
Halfway Point
Midpoint
About 198.5 mi from Diamond Bar, CA · 3h 43m 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 198.5 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 225.6 miles.
Arriving in Oakland, CA
The final approach into Oakland, 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 Oakland, 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
Oakland, CA
Afternoon in Oakland on Sunday
Local time
12:50 PM
PDT
Current temp
46°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 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 21m 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 Oakland, CA covers 396.9 miles and takes about 7h 21m without stops. Add 15-30 minutes for a fuel or rest stop on longer drives.
The main roads are Westside Freeway, Foothill Freeway, 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 198.5 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 $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 0.1 miles: Lane positioning matters here; 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.
On the drive from Diamond Bar, CA to Oakland, CA, road signs begin pointing toward San Francisco along the way.
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