San Bernardino to Martinez is 427.3 miles and takes about 7h 58m via Westside Freeway, with a fuel budget near $102 and enough daylight to finish in a day. This route stays within California, beginning in the Pacific Coast region and ending in the same area. It's primarily a highway drive, making it a straightforward option for a single-day trip. You'll encounter mostly freeway conditions for the majority of the distance, so plan for steady progress.
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
213.6 miles from San Bernardino, CA
A natural place for your longest stop of the day
, about 4h 1m into the drive
.
Main Roads
Road
Distance
Duration
Westside Freeway
225.6 mi
4h 1m
Foothill Freeway
73.8 mi
1h 25m
I 5 Truck
37.1 mi
42m
Golden State Freeway
22.3 mi
25m
Arthur H. Breed Junior Freeway
19.6 mi
22m
William Elton Brown Freeway
17 mi
18m
Donald D Doyle Highway
15.2 mi
17m
Senator Daniel E Boatwright Highway
8.9 mi
10m
Longest stretch:
Westside Freeway
— 225.6 mi, about 4h 1m
Traffic on I-5
Hour-of-day weekday pattern from 81 FHWA count stations on your route.
Peak
2 PM
~1,500 veh/hr typical
· worst 2,272
Quietest
2 AM
~312 veh/hr
Peak-to-quiet ratio
4.8×
busier at peak than in the quiet hours
12a6anoon6p11p
Averaged across 44 weeks of 2023 FHWA Travel Monitoring Analysis System data. Weekday hours only (Mon–Fri).
Turn-by-Turn Driving Directions
Step-by-step road directions between San Bernardino, CA and Martinez, CA.
1
Start on West 5th Street
0.7 mi·1 min·West 5th Street
2
Take the ramp
0.3 mi·45 sec
Toward I 215 North: Barstow
3
Merge onto I 215
1.5 mi·1 min·San Bernardino Freeway
Use the straight / slight right lanes.
4
Continue on I 215
0.5 mi·34 sec·Barstow Freeway
Use the straight / slight right lanes.
5
Take the exit
1.0 mi·2 min
Exit 46BToward CA 210 West: PasadenaUse the straight / slight right lanes.
6
Merge onto CA 210
21 mi·24 min·Foothill Freeway
Use the straight / slight right lanes.
7
Keep slight right at fork onto CA 210
1.2 mi·1 min·Foothill Freeway
Use the straight / slight right lanes.
8
Keep slight right at fork onto CA 210
2.4 mi·2 min·Foothill Freeway
Use the straight / slight right lanes.
9
Keep slight right at fork onto CA 210
1.4 mi·1 min·Foothill Freeway
Use the straight / slight right lanes.
10
Keep slight right at fork onto CA 210
1.8 mi·2 min·Foothill Freeway
Use the straight / slight right lanes.
11
Keep slight right at fork onto CA 210
20 mi·23 min·Foothill Freeway
Use the straight / slight right lanes.
12
Keep slight right at fork onto I 210
26 mi·29 min·Foothill Freeway
Exit 26AToward I 210 West: SacramentoUse the straight / slight right lanes.
13
Keep slight right at fork
0.1 mi·9 sec
Use the slight right lane.
14
Merge onto I 5 Truck
1.0 mi·1 min·I 5 Truck
Exit 161A
15
Keep slight left at fork onto I 5 Truck
36 mi·41 min·I 5 Truck
Use the straight / slight right lanes.
16
Keep slight left at fork onto I 5
22 mi·25 min·Golden State Freeway
Use the straight / slight right lanes.
17
Keep slight right at fork onto I 5
226 mi·4 hr 1 min·Westside Freeway
Toward I 5 NorthUse the straight / slight right lanes.
18
Keep slight left at fork onto I 580
16 mi·17 min·William Elton Brown Freeway
Toward I 580 West: Tracy, San Francisco
19
Keep slight right at fork onto I 580 Bypass
1.1 mi·1 min·William Elton Brown Freeway
20
Merge onto I 580
18 mi·20 min·Arthur H. Breed Junior Freeway
Use the straight / slight right lanes.
21
Keep slight right at fork onto I 580
1.6 mi·1 min·Arthur H. Breed Junior Freeway
22
Take the exit
0.2 mi·16 sec
Exit 44BToward I 680 South, I 680 North: San Jose, Sacramento, Concord, Walnut CreekUse the slight right lane.
23
Keep slight right at fork
0.3 mi·30 sec
Toward I 680 North: Walnut Creek, Concord, SacramentoUse the straight / slight right lanes.
24
Merge onto I 680
15 mi·17 min·Donald D Doyle Highway
Use the straight / slight right lanes.
25
Continue on I 680
5.0 mi·5 min·Senator Daniel E Boatwright Highway
Toward I 680, CA 24Use the straight / slight right lanes.
26
Keep slight left at fork onto I 680
3.9 mi·4 min·Senator Daniel E Boatwright Highway
Toward I 680 North: Martinez, SacramentoUse the straight / slight right lanes.
27
Take the exit
0.4 mi·51 sec
Exit 54Toward Pacheco Boulevard, Arthur RoadUse the straight / slight right lanes.
28
Continue on Pacheco Boulevard
2.4 mi·4 min·Pacheco Boulevard
Use the straight lane.
29
Continue on Pine Street
0.2 mi·19 sec·Pine Street
30
Continue on Court Street
0.2 mi·30 sec·Court Street
31
Turn right onto Escobar Street
251 ft·8 sec·Escobar Street
32
Arrive at destination
Escobar Street
Trip Plan
With a drive time under 8 hours, this trip is well-suited for a single day. Aim to depart San Bernardino early, perhaps before 8 AM, to make the most of daylight and minimize traffic. You'll have two designated stops, so plan to take your first break around the halfway point, roughly 3.5 to 4 hours into your drive. Keep an eye on your fuel gauge, especially during the longest 225.6-mile stretch on the Westside Freeway, as services can be spaced out on major highways. The $102 fuel estimate is a good baseline, but check current prices.
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 213.6 miles from San Bernardino, CA, or about 4h 1m 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 94 miles or 1h 50m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 213.6 miles or 4h 1m 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 46m
Traffic, exits, and arrival timing usually matter more near Martinez, CA than in the middle of the route.
Before You Leave
+
Open the route before leaving San Bernardino, 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 San Bernardino, CA
This is one driving day of about 427.3 miles and 7h 58m.
Your first comfortable stop window is around 94 miles from San Bernardino, 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.
Place data sourced from public business listings. Hours and availability may vary.
Heads-up: tricky spots
5 of 26
5 decision points cluster between mile 52.2 and 424.1 — GPS handles the exact turns, but know they're coming. Your lane choice matters more than the turn itself.
8
52.2 mi into trip|~1h 2m 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
399.5 mi into trip|~7h 22m in
Take the exit toward I 680 South, I 680 North: San Jose, Sacramento, Concord, Walnut Creek
Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one
Use the slight right lane.
Exit 44B
Toward I 680 South, I 680 North: San Jose, Sacr...
9
399.6 mi into trip|~7h 22m in
Keep slight right at fork toward I 680 North: Walnut Creek, Concord, Sacramento
Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one
Use the straight / slight right lanes.
Toward I 680 North: Walnut Creek, Concord, Sacr...
8
420.2 mi into trip|~7h 46m in|I 680 / Senator Daniel E Boatwright Highway
Keep slight left at fork onto I 680 / Senator Daniel E Boatwright Highway toward I 680 North: Martinez, Sacramento
Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one
Use the straight / slight right lanes.
Toward I 680 North: Martinez, Sacramento
8
424.1 mi into trip|~7h 51m in
Take the exit toward Pacheco Boulevard, Arthur Road
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 54
Toward Pacheco Boulevard, Arthur Road
Fuel & Cost
Regular Gas
$100.35 one way
$200.70 round trip
$5.97/gal25.4 MPG avg150 kg CO2
Fuel Type
$/gal
One Way
Round Trip
midgrade
$6.18
$104.00
$208.00
premium
$6.30
$105.93
$211.87
diesel
$5.35
$90.00
$180.00
No toll roads detected on this route.
Estimated Trip Cost (one way, 1 person)
Fuel
$100
Meals
$25–$50
Total
$125–$150
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 149.5 kg one way.
Prices: EIA weekly data, 2026-06-01.
Driving Electric?
About $45 in charging
· 1 stop
· 67% less CO2
Vehicle Type
kWh
Stops
DC Fast
Home Charge
Average EV
128.2
1
$44.87
$20.51
Efficient EV
106.8
1
$37.39
$17.09
EV Truck/SUV
170.9
2
$59.82
$27.35
Gas CO2
150 kg
EV CO2
50 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.
Forecast as of Jun 1, 2026
Origin
San Bernardino, CA
Afternoon
in San Bernardino on Wednesday
Local time
12:52 PM
PDT
Current temp
60°F
Mostly Clear
0 mph0% chanceLive forecast
Beach Hazards Statement
Beach Hazards Statement issued May 31 at 1:12PM PDT until June 2 at 5:00AM PDT by NWS San Francisco CA
Destination
Martinez, CA
Afternoon
in Martinez on Wednesday
Local time
12:52 PM
PDT
Current temp
54°F
Clear
WSW 5 mph0% chanceLive forecast
Beach Hazards Statement
Beach Hazards Statement issued May 31 at 1:12PM PDT until June 2 at 5:00AM PDT by NWS San Francisco CA
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
6 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 58m 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...
6 mi from route
~16 min detour
Free
near mile 427.3
Rosie the Riveter WWII Home Front National Historical Park
National Historical Park
Celebrate and honor the contributions and sacrifices of American civilians on the WWII home front. Discover how diverse communities lived, worked, and interacted. Many faces, many stories, many truths...
14 mi from route
~36 min detour
Free
near mile 427.3
Established in 1988, San Francisco Maritime National Historical Park celebrates America’s maritime heritage on the Pacific Coast. Our 50-acre park has grown around Aquatic Park Cove, a protected area...
21 mi from route
~54 min detour
Free
near mile 427.3
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...
24 mi from route
~61 min detour
Free
near mile 73.7
Walk among old growth coast redwoods, cooling their roots in the fresh water of Redwood Creek and lifting their crowns to reach the sun and fog. Federally protected as a National Monument since 1908,...
26 mi from route
~64 min detour
$15
near mile 427.3
Experience a park so rich it supports 19 distinct ecosystems with over 2,000 plant and animal species. Go for a hike, enjoy a vista, have a picnic or learn about the centuries of overlapping history f...
28 mi from route
~69 min detour
Free
near mile 427.3
Park data from the National Park Service API. Alerts update every 2 hours.
More Details
What kind of drive is this?
This drive is overwhelmingly on highways, with 93% of the 427.3 miles being freeway. You'll experience a long stretch of 225.6 miles on the Westside Freeway. Expect a consistent highway experience for most of the trip before transitioning to surface roads closer to Martinez. The density of exits and merges typical of freeway travel will be a constant.
93% highway — fuel and pacing are the main things to plan.
32 navigation steps total — most of the decisions cluster near the start and finish.
Longest single stretch: 225.6 mi on Westside Freeway.
How Hard Is This Drive?
10/10
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 52.2 miles in near I 210 / Foothill Freeway.
Driving Effort10/10
High effort - long or complex enough to need steady focus all day
Balances navigation complexity with total wheel time.
This is a demanding drive. With 26 significant decision points across 427.3 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 52.2 miles (I 210 / Foothill Freeway): Highway fork - watch signs carefully. Lane positioning matters here; at 399.5 miles: Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one; at 399.6 miles: Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one.
Elevation Profile
Hilly terrain with moderate elevation changes
3,892 ft15 ft
Total Climb
3,733 ft
Total Descent
4,769 ft
Highest Point
3,892 ft
~122.1 mi in
Elevation Range
3,877 ft
Notable High Points
3,892 ft at ~122.1 miles+2,788 ft prominence
Towns Mentioned on Route Signs
Based on OSRM destination-sign hints, not a full list of every settlement the road passes.
Between San Bernardino, CA and Martinez, CA, road signs point toward San Francisco, Sacramento, Concord and Walnut Creek.
Martinez is in the outer East Bay in the San Francisco Bay Area in California. Martinez has easy access to nature, so it's no wonder the famed naturalist John Muir decided to settle here.
Top landmarks
•John Muir National Historic Site — former home of John Muir in Martinez, California
•Martinez Library — Martinez Branch of the Contra Costa County Library system
Doable as a same-day drive at 7h 58m. Total distance: 427.3 miles.
Family Friendly
Moderate complexity with 2 natural rest stops along the way.
Solo Traveler
7h 58m drive, plan rest stops for pacing.
Frequently Asked Questions
The longest stretch is about 225.6 miles on Westside Freeway. The full list of main roads is in the Roads section above.
Yes — we found about 35 rest areas or service plazas within a short detour of the route (from OpenStreetMap). See the Rest Stops tab under Nearby Places for locations and mile markers. Plan to stretch, use the bathroom, and top off fluids every 2–3 hours on longer drives.
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 Martinez, 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. There are 35 rest areas along the route for bathroom stops.
The main spots that need attention: at 52.2 miles (I 210 / Foothill Freeway): Highway fork - watch signs carefully. Lane positioning matters here; at 399.5 miles: Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one; at 399.6 miles: Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one.
Yes — Port Chicago Naval Magazine National Memorial, Rosie the Riveter WWII Home Front National Historical Park and San Francisco Maritime National Historical Park (6 total within detour distance). See the National Parks section for detour distances and tips on detours.
Not recommended in a single day. At 8.0 hours each way, a round trip means 15.9 hours of driving — that is an unsafe level of fatigue for most drivers. Plan at least one night at Martinez, CA before the return drive.
