Trip from Diamond Bar, CA to Fremont, CA

Drive Time

7h 12m

Distance

381.8 mi

614 km

Drive Score

8/10

Great drive

Same Day?

Yes, doable

Fuel Cost

$88

one way

EV Charging

station data

Best Time to Leave

Save up to 32 min

4 AM

7h 2m ★

6 AM

7h 12m

8 AM

7h 34m

10 AM

7h 20m

12 PM

7h 18m

3 PM

7h 21m

5 PM

7h 33m

8 PM

7h 6m

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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Diamond Bar, CA

Lany-Jade Mondou

Trip Overview

Traveling from Diamond Bar to Fremont covers 381.8 miles and typically takes about 7 hours and 12 minutes. This highway-focused trip is well-suited for a single day of driving if you are comfortable spending the better part of a day on the road. You should budget approximately $88 for fuel to complete the journey. The route primarily utilizes the Foothill Freeway, the Westside Freeway, and CA 152 to navigate through the Pacific Coast region. While it is certainly feasible to complete this trek in one go, planning for at least two stops will help keep you alert and refreshed as you head north.

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

190.9 miles from Diamond Bar, CA

A natural place for your longest stop of the day , about 3h 35m into the drive .

Drive Character

Expect a highly efficient transit, as 99% of this route consists of highway driving. You will spend a significant portion of your time on the Westside Freeway, which features the longest uninterrupted stretch of the trip at 182.5 miles. Because the path is so heavily reliant on major interstates, the experience feels more like a dedicated transit than a leisurely scenic tour. The road's personality is defined by consistent speed and steady, high-mileage movement. It is a straightforward, no-nonsense drive that rewards drivers who prefer predictable pavement over technical local roads.

Most of the miles stay on highways, which makes pacing and fuel planning easier than turn-by-turn city driving.

There are about 25 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 0.1 miles in.

Route Complexity 10/10

High effort - long or complex enough to need steady focus all day

This is a demanding drive. With 21 significant decision points across 381.8 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 21 key points

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

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

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

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

111 mi into trip | ~2h 9m 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 none / straight / slight right lanes. Toward I 5 North

380.1 mi into trip | ~7h 9m in

Take the exit toward Mowry Avenue, Central Fremont

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 17 Toward Mowry Avenue, Central Fremont

Towns Along This Route

Between Diamond Bar, CA and Fremont, CA, road signs point toward Hollister and San Jose.

Hollister

293.5 mi in | ~5h 24m

San Jose

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
Nimitz Freeway	13 mi	14m
US 101	12.2 mi	14m

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 Fremont, CA.

Start on this road

33 ft · 4 sec · this road

Turn left

84 ft · 8 sec

Turn right onto North Diamond Bar Boulevard

0.1 mi · 19 sec · North Diamond Bar Boulevard

Take the ramp

0.2 mi · 30 sec

Toward CA 57 North Use the left lane.

Continue on CA 57

6.1 mi · 7 min · Orange Freeway

Use the none / straight / slight right lanes.

Keep slight left at fork

1.1 mi · 2 min

Exit 25C Toward I 210 West: Pasadena Use the none lane.

Merge onto I 210

18 mi · 21 min · Foothill Freeway

Use the none lane.

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.

Keep slight right at fork

0.1 mi · 9 sec

Use the slight right lane.

Merge onto I 5 Truck

1.0 mi · 1 min · I 5 Truck

Exit 161A

Keep slight left at fork onto I 5 Truck

36 mi · 41 min · I 5 Truck

Use the none / straight / slight right lanes.

Keep slight left at fork onto I 5

22 mi · 25 min · Golden State Freeway

Use the none / straight / slight right lanes.

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.

Take the exit

0.2 mi · 26 sec

Exit 403B Toward CA 152 West: Gilroy, Hollister, San Jose

Continue on CA 152; CA33

29 mi · 33 min · CA 152; CA33

Use the none lane.

Keep slight right at fork onto CA 152

12 mi · 16 min · CA 152

Use the none lane.

Take the exit onto CA 152

0.5 mi · 1 min · CA 152

Toward US 101 North: San Jose

Merge onto US 101; CA 152

20 mi · 22 min · South Valley Freeway

Use the none / slight right lanes.

Keep slight left at fork onto US 101

12 mi · 14 min · US 101

Use the none lane.

Take the exit

0.2 mi · 29 sec

Exit 388B Toward I 880 North: Oakland Use the straight / slight right lanes.

Merge onto I 880

7.3 mi · 8 min · Nimitz Freeway

Use the none / straight / slight right lanes.

Keep slight right at fork onto I 880

5.7 mi · 6 min · Nimitz Freeway

Use the none lane.

Take the exit

0.3 mi · 36 sec

Exit 17 Toward Mowry Avenue, Central Fremont Use the straight / slight right lanes.

Turn right onto Mowry Avenue

1.4 mi · 2 min · Mowry Avenue

Use the right lane.

Arrive at destination

Mowry Avenue

Trip Plan

To manage the 381.8-mile distance comfortably, consider timing your departure to avoid the heaviest traffic periods near your origin and destination. Since the journey requires about 7 hours of active driving time, pacing yourself with two planned stops is essential for maintaining focus. Keep a close eye on your fuel gauge, as the $88 estimated cost can fluctuate depending on your vehicle's efficiency and current regional pump prices. Given the long 182.5-mile stretch on the Westside Freeway, ensure your vehicle is prepped for sustained speeds before you head out. Flexibility is your best friend here, so don't hesitate to add a third stop if you find yourself needing an extra break along the way.

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 190.9 miles from Diamond Bar, CA, or about 3h 35m 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 84 miles or 1h 38m in

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

Halfway reset

Around 190.9 miles or 3h 35m 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 57m

Traffic, exits, and arrival timing usually matter more near Fremont, 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 381.8 miles and 7h 12m.

Your first comfortable stop window is around 84 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 182.5 miles.

Where to Stop

Rest stops, refuel points, and overnight suggestions along this route.

Halfway Point

Midpoint

About 190.9 mi from Diamond Bar, CA · 3h 35m into the drive

Mid-route town

Meal stop

Bakersfield, CA

191 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 84 miles helps settle the day before fatigue starts building.

Fresno, CA

Meal break

The midpoint is around 190.9 miles from Diamond Bar, CA, which is a good place for a longer meal and fuel stop.

Before the longest stretch

Fuel check

Top up before Westside Freeway if your tank is already low. That segment runs about 182.5 miles.

Arriving in Fremont, CA

The final approach into Fremont, 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 Fremont, 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

$88.42 one way

$176.83 round trip

$5.88/gal 25.4 MPG avg 134 kg CO₂

Fuel Type	$/gal	One Way	Round Trip
midgrade	$6.07	$91.18	$182.36
premium	$6.24	$93.84	$187.68
diesel	$5.64	$84.82	$169.65

No toll roads detected on this route.

Estimated Trip Cost (one way, 1 person)

Fuel

$88

Meals

$25–$50

Total

$113–$138

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

Estimated CO2 emission: 133.6 kg one way. Prices: EIA weekly data, 2026-04-06.

Driving Electric?

About $40 in charging · 1 stop · 66% less CO₂

Vehicle Type	kWh	Stops	DC Fast	Home Charge
Average EV	114.5	1	$40.09	$18.33
Efficient EV	95.5	1	$33.41	$15.27
EV Truck/SUV	152.7	1	$53.45	$24.44

Gas CO2

134 kg

EV CO2

45 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 data refreshed 2 days ago

Origin

Diamond Bar, CA

Afternoon in Diamond Bar on Sunday

Local time

1:34 PM

PDT

Current temp

53°F

Unavailable

Live forecast

Destination

Fremont, CA

Afternoon in Fremont on Sunday

Local time

1:34 PM

PDT

Current temp

48°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

5 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 12m 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 Fremont, CA covers 381.8 miles and takes about 7h 12m 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 190.9 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 $88.42 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.

Between Diamond Bar, CA and Fremont, CA, road signs point toward Hollister and San Jose.

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Return Trip

Fremont, CA to Diamond Bar, CA

Plan the drive back the other way.

382.5 mi 7h 14m

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Trip from Diamond Bar, CA to Fremont, CA

Best Time to Leave

Trip Overview

Drive Character

How Hard Is This Drive?

Critical Maneuvers

Towns Along This Route

Main Roads

Turn-by-Turn Driving Directions

Trip Plan

Before You Leave

Where to Stop

Pacing Suggestions

Arriving in Fremont, CA

Fuel & Cost

Travel Intel

Diamond Bar, CA

Fremont, CA

Same local time

5 degrees cooler at arrival

7h 12m on the road

Frequently Asked Questions

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