Brentwood, CA to Santa Ana, CA is 375.7 miles and takes about 7h 5m via Westside Freeway/I 5 Truck/Santa Ana Freeway, with a fuel budget near $86 and enough daylight to finish in a day. This drive stays within California, connecting the Pacific Coast region. It's a predominantly highway route, making it a straightforward option for a single-day trip. Plan for a long day of driving with most of your time spent on major freeways.
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
187.8 miles from Brentwood, CA
A natural place for your longest stop of the day
, about 3h 32m into the drive
.
Main Roads
Road
Distance
Duration
Westside Freeway
224.4 mi
4h
I 5 Truck
83.3 mi
1h 36m
Santa Ana Freeway
26 mi
30m
William Elton Brown Freeway
14 mi
15m
Byron Highway
8.1 mi
12m
Golden State Freeway
5.3 mi
6m
Brentwood Boulevard
3.7 mi
5m
Mountain House Parkway
3.4 mi
6m
Longest stretch:
Westside Freeway
— 224.4 mi, about 4h
Turn-by-Turn Driving Directions
Step-by-step road directions between Brentwood, CA and Santa Ana, CA.
1
Start on Brentwood Boulevard
66 ft·8 sec·Brentwood Boulevard
2
Turn left onto Oak Street
97 ft·9 sec·Oak Street
Use the left lane.
3
Turn left
305 ft·23 sec
4
Turn right onto Brentwood Boulevard
3.7 mi·5 min·Brentwood Boulevard
5
Continue on Byron Highway
1.4 mi·2 min·Byron Highway
Use the straight lane.
6
Turn right onto J4
6.7 mi·10 min·Byron Highway
7
Continue on J4
1.5 mi·2 min·Byron-Bethany Road
8
Continue on J4
1.8 mi·2 min·Byron Road
9
Turn right onto Mountain House Parkway
2.7 mi·4 min·Mountain House Parkway
Use the slight left lane.
10
Continue on International Parkway
1.0 mi·1 min·International Parkway
Use the straight lane.
11
Continue on Mountain House Parkway
0.8 mi·1 min·Mountain House Parkway
Use the straight lane.
12
Take the ramp
0.2 mi·30 sec
13
Merge onto I 580
8.1 mi·8 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 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 straight / slight right lanes.
17
Keep slight left at fork onto I 5
4.1 mi·4 min·Golden State Freeway
Use the straight / slight right lanes.
18
Keep slight right at fork onto I 5 Truck
0.3 mi·17 sec·I 5 Truck
Exit 158Toward I 405 SouthUse the straight / slight right lanes.
19
Keep slight left at fork onto I 5 Truck
25 mi·29 min·I 5 Truck
Use the straight / slight right lanes.
20
Keep slight left at fork onto I 5
1.3 mi·1 min·Golden State Freeway
Toward CA 60 East, I 5 South: Pomona, Soto Street, Santa AnaUse the slight left / straight lanes.
21
Merge onto I 5
26 mi·30 min·Santa Ana Freeway
Use the straight / slight right lanes.
22
Keep slight right at fork onto I 5
0.2 mi·16 sec·Santa Ana Freeway
Use the straight / slight right lanes.
23
Take the exit
0.8 mi·57 sec
Toward Broadway, Main Street, Santa AnaUse the straight / slight right lanes.
24
Keep slight right at fork
0.3 mi·21 sec
Toward Main Street North, BroadwayUse the straight / slight right lanes.
25
Turn straight onto North Broadway
1.3 mi·2 min·North Broadway
Use the left lane.
26
Turn left onto West 5th Street
0.1 mi·16 sec·West 5th Street
Use the left lane.
27
Turn right onto North Main Street
0.2 mi·30 sec·North Main Street
Use the right lane.
28
Turn right onto West 1st Street
52 ft·1 sec·West 1st Street
Use the right lane.
29
Arrive at destination
West 1st Street
Trip Plan
To make the most of this 7-hour drive, aim to depart Brentwood, CA early in the morning to avoid potential traffic, especially as you approach the Los Angeles metropolitan area. With only 2 recommended stops, you can space them out as needed, perhaps one mid-morning and another in the afternoon. Keep an eye on your fuel gauge, as the longest stretch without a major break is over 224 miles. This route is well-suited for a single day, but if you prefer a more relaxed pace, consider breaking it up with an overnight stay, though it's entirely manageable in one go.
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 187.8 miles from Brentwood, CA, or about 3h 32m 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 83 miles or 1h 39m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 187.8 miles or 3h 32m 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 53m
Traffic, exits, and arrival timing usually matter more near Santa Ana, CA than in the middle of the route.
Before You Leave
+
Open the route before leaving Brentwood, 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 Brentwood, CA
This is one driving day of about 375.7 miles and 7h 5m.
Your first comfortable stop window is around 83 miles from Brentwood, 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.
Place data sourced from public business listings. Hours and availability may vary.
Heads-up: tricky spots
5 of 22
5 decision points cluster between mile 0 and 373.7 — GPS handles the exact turns, but know they're coming. Your lane choice matters more than the turn itself.
7
0 mi into trip|~0m in|Oak Street
Turn left onto Oak Street
Lane positioning matters here
Use the left lane.
8
320.7 mi into trip|~5h 59m in|I 5 Truck
Keep slight right at fork onto I 5 Truck toward I 405 South
Highway fork - watch signs carefully. Lane positioning matters here
Use the straight / slight right lanes.
Exit 158
Toward I 405 South
8
345.7 mi into trip|~6h 28m in|I 5 / Golden State Freeway
Keep slight left at fork onto I 5 / Golden State Freeway toward CA 60 East, I 5 South: Pomona, Soto Street, Santa Ana
Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one
Use the slight left / straight lanes.
Toward CA 60 East, I 5 South: Pomona, Soto Stre...
7
372.9 mi into trip|~7h in
Take the exit toward Broadway, Main Street, Santa Ana
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.
Toward Broadway, Main Street, Santa Ana
8
373.7 mi into trip|~7h 1m in
Keep slight right at fork toward Main Street North, Broadway
Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one
Use the straight / slight right lanes.
Toward Main Street North, Broadway
Fuel & Cost
Regular Gas
$86.35 one way
$172.70 round trip
$5.84/gal25.4 MPG avg132 kg CO2
Fuel Type
$/gal
One Way
Round Trip
midgrade
$6.02
$88.98
$177.97
premium
$6.18
$91.37
$182.73
diesel
$5.61
$82.95
$165.90
No toll roads detected on this route.
Estimated Trip Cost (one way, 1 person)
Fuel
$86
Meals
$25–$50
Total
$111–$136
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 131.5 kg one way.
Prices: EIA weekly data, 2026-04-13.
Driving Electric?
About $39 in charging
· 1 stop
· 66% less CO2
Vehicle Type
kWh
Stops
DC Fast
Home Charge
Average EV
112.7
1
$39.45
$18.03
Efficient EV
93.9
1
$32.87
$15.03
EV Truck/SUV
150.3
1
$52.60
$24.04
Gas CO2
131 kg
EV CO2
44 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 19, 2026
Origin
Brentwood, CA
Late night
in Brentwood on Sunday
Local time
2:58 AM
PDT
Current temp
53°F
Mostly Cloudy
WNW 5 mph0% chanceLive forecast
Destination
Santa Ana, CA
Late night
in Santa Ana on Sunday
Local time
2:58 AM
PDT
Current temp
57°F
Mostly Cloudy
SW 0 to 5 mph0% chanceLive 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
4 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 5m 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.
National Parks Near This Route
Worth a detour if your schedule allows.
Port Chicago Naval Magazine National Memorial
National Memorial
On July 17, 1944, a massive explosion jolted the San Francisco East Bay area, shattering windows and lighting up the night sky. At Port Chicago Naval Magazine, 320 men were killed instantly when two s...
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...
22 mi from route
~55 min detour
Free
near mile 323.9
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 259.1
Park data from the National Park Service API. Alerts update every 2 hours.
More Details
What kind of drive is this?
This drive is 95% highway, meaning you'll spend nearly all your time on major freeways. The longest continuous stretch on the Westside Freeway is 224.4 miles. You can expect a consistent cruising experience for the majority of the trip. The drive transitions from freeway to surface roads very late in the route.
95% highway — fuel and pacing are the main things to plan.
29 navigation steps total — most of the decisions cluster near the start and finish.
Longest single stretch: 224.4 mi on Westside Freeway.
How Hard Is This Drive?
8/10
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 early in the drive near Oak Street.
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 22 significant decision points across 375.7 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: near the start (Oak Street): Lane positioning matters here; at 320.7 miles (I 5 Truck): Highway fork - watch signs carefully. Lane positioning matters here; at 345.7 miles (I 5 / Golden State Freeway): Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one.
Brentwood is an affluent, suburban city in eastern Contra Costa County, California with a popular downtown for visitors coming from the Sacramento Valley to the county. It serves as one of the eastern gateways to the East Bay, along with Livermore. Many in the city are commuters.
Top landmarks
•Stone House of John Marsh — historic stone house in Contra Costa County, California
Doable as a same-day drive at 7h 5m. Total distance: 375.7 miles.
Family Friendly
Moderate complexity with 2 natural rest stops along the way.
Solo Traveler
7h 5m drive, plan rest stops for pacing.
Frequently Asked Questions
The longest stretch is about 224.4 miles on Westside Freeway. The full list of main roads is in the Roads section above.
We did not find dedicated rest areas on this route. For a drive this long, plan bathroom and stretch breaks around gas stations, fast-food stops, or small-town downtowns — check the Nearby Places section for options.
It helps. This route has a higher-than-average number of complex decision points, which get harder in the dark. If the last hour of the trip is on surface roads or mountain grades, aim to arrive at Santa Ana, CA before sunset when you can. Check the Trip Plan for departure windows that land you in daylight.
Only with planning. This is a long drive for kids — consider splitting it into two days rather than pushing through. Plan at least 2 meaningful breaks. Dedicated rest areas are limited, so plan gas or food stops as your bathroom breaks.
The main spots that need attention: near the start (Oak Street): Lane positioning matters here; at 320.7 miles (I 5 Truck): Highway fork - watch signs carefully. Lane positioning matters here; at 345.7 miles (I 5 / Golden State Freeway): Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one.
Yes — Port Chicago Naval Magazine National Memorial, Santa Monica Mountains National Recreation Area and César E. Chávez National Monument. See the National Parks section for detour distances and tips on detours.
Not recommended in a single day. At 7.1 hours each way, a round trip means 14.2 hours of driving — that is an unsafe level of fatigue for most drivers. Plan at least one night at Santa Ana, CA before the return drive.
