Origin
Irvine, CA
Afternoon in Irvine on Friday
Local time
4:58 PM
PDT
Current temp
65°F
Unavailable
Live forecast
Trip from Irvine, CA to Discovery Bay, CA
Pin this tripCompiled and reviewed by the US Trip Planner planning team at COD Solutions Oy · Last reviewed Sep 11, 2026 · Editorial standards
Drive Time
7h 15m
Distance
386.1 mi
621 km
Drive Score
8/10
Great drive
Same Day?
Yes, doable
Fuel Cost
$88
one way
EV Charging
Unknown
Best Time to Leave
4 AM
7h 4m
★
6 AM
7h 15m
8 AM
7h 37m
10 AM
7h 23m
12 PM
7h 20m
3 PM
7h 24m
5 PM
7h 36m
8 PM
7h 9m
Estimated drive times based on typical traffic patterns. Actual times may vary with weather, construction, and real-time conditions.
Irvine, CA
Wikimedia Commons
Discovery Bay, CA
Wikimedia Commons
Trip Overview
The drive from Irvine, CA to Discovery Bay, CA covers 386.1 miles and takes about 7h 15m behind the wheel. This route is realistic as a one-day drive if you keep your stops efficient.
The route leans on Westside Freeway, Golden State Freeway, I 5 Truck for much of the mileage, and the overall profile is mostly highway. The longest uninterrupted segment is about 225.6 miles on Westside Freeway. At current regular gas prices, budget about $87.97 one way before food or hotel costs.
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
193 miles from Irvine, CA
A natural place for your longest stop of the day , about 3h 37m into the drive .
Main Roads
| Road | Distance | Duration |
|---|---|---|
| Westside Freeway | 225.6 mi | 4h 1m |
| Golden State Freeway | 50 mi | 57m |
| I 5 Truck | 37.7 mi | 43m |
| Santa Ana Freeway | 29.6 mi | 34m |
| William Elton Brown Freeway | 13.9 mi | 14m |
| Byron Highway | 6.7 mi | 10m |
| San Diego Freeway | 5.6 mi | 6m |
| Costa Mesa Freeway | 3.6 mi | 4m |
Longest stretch:
Westside Freeway
— 225.6 mi, about 4h 1m
Traffic on I-5
Hour-of-day weekday pattern from 376 FHWA count stations on your route.
Peak
3 PM
~3,231 veh/hr typical · worst 4,084
Quietest
2 AM
~538 veh/hr
Peak-to-quiet ratio
6×
busier at peak than in the quiet hours
12a
6a
noon
6p
11p
Averaged across 89 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 Irvine, CA and Discovery Bay, CA.
1
Start on I 405
1.4 mi
·
1 min
·
San Diego Freeway
2
Take the exit
0.3 mi
·
21 sec
Exit 4
Toward University Drive, Jeffrey Road
3
Turn left onto Jeffrey Road
0.2 mi
·
22 sec
·
Jeffrey Road
Use the left lane.
4
Take the ramp
0.2 mi
·
18 sec
Toward I 405 North: Los Angeles
Use the straight / right lanes.
5
Merge onto I 405
4.2 mi
·
4 min
·
San Diego Freeway
Use the straight / slight right lanes.
6
Take the exit
0.2 mi
·
16 sec
Exit 9A
Toward CA 55 South, CA 55 North: Freeway
Use the slight right lane.
7
Keep slight right at fork
0.5 mi
·
35 sec
Toward CA 55 North
Use the slight left / slight right lanes.
8
Merge onto CA 55
3.2 mi
·
3 min
·
Costa Mesa Freeway
Use the straight / slight right lanes.
9
Keep slight right at fork onto CA 55
0.4 mi
·
28 sec
·
Costa Mesa Freeway
Use the straight / slight left lanes.
10
Take the exit
0.7 mi
·
46 sec
Exit 10B
Toward I 5 North: Santa Ana
Use the straight / slight right lanes.
11
Merge onto I 5
0.5 mi
·
36 sec
·
Santa Ana Freeway
Use the straight / slight right lanes.
12
Keep slight right at fork onto I 5
1.7 mi
·
1 min
·
Santa Ana Freeway
13
Keep slight right at fork onto I 5
9.4 mi
·
10 min
·
Santa Ana Freeway
Use the slight right lane.
14
Keep slight right at fork onto I 5
18 mi
·
20 min
·
Santa Ana Freeway
Use the straight / slight right lanes.
15
Keep slight right at fork onto I 5
25 mi
·
29 min
·
Golden State Freeway
Use the straight / slight right lanes.
16
Keep slight left at fork onto I 5
2.2 mi
·
2 min
·
Golden State Freeway
Use the straight / slight right lanes.
17
Keep slight right at fork onto I 5 Truck
1.5 mi
·
1 min
·
I 5 Truck
Exit 161A
Toward I 5 Truck North, CA 14 Truck
Use the straight / slight right lanes.
18
Keep slight left at fork onto I 5 Truck
36 mi
·
41 min
·
I 5 Truck
Use the straight / slight right lanes.
19
Keep slight left at fork onto I 5
22 mi
·
25 min
·
Golden State Freeway
Use the straight / slight right lanes.
20
Keep slight right at fork onto I 5
226 mi
·
4 hr 1 min
·
Westside Freeway
Toward I 5 North
Use the straight / slight right lanes.
21
Keep slight left at fork onto I 580
14 mi
·
14 min
·
William Elton Brown Freeway
Toward I 580 West: Tracy, San Francisco
22
Take the exit
0.2 mi
·
22 sec
23
Keep slight right at fork
288 ft
·
7 sec
Toward Patterson Pass Road
24
Turn straight onto Mountain House Parkway
0.7 mi
·
1 min
·
Mountain House Parkway
Use the straight lane.
25
Turn right onto International Parkway
0.8 mi
·
1 min
·
International Parkway
26
Continue on Mountain House Parkway
2.8 mi
·
5 min
·
Mountain House Parkway
Use the straight lane.
27
At end of road, turn left onto J4
1.8 mi
·
2 min
·
Byron Road
Use the slight left lane.
28
Continue on J4
1.5 mi
·
2 min
·
Byron-Bethany Road
29
Continue on J4
6.7 mi
·
10 min
·
Byron Highway
30
Take the ramp
324 ft
·
8 sec
31
Merge onto CA 4
2.1 mi
·
2 min
·
CA 4
Use the left lane.
32
Turn left onto Discovery Bay Boulevard
1.3 mi
·
3 min
·
Discovery Bay Boulevard
Use the left / straight lanes.
33
Turn right
57 ft
·
2 sec
34
Arrive at destination
Trip Plan
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 193 miles from Irvine, CA, or about 3h 37m 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 85 miles or 1h 38m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 193 miles or 3h 37m 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
Traffic, exits, and arrival timing usually matter more near Discovery Bay, CA than in the middle of the route.
Before You Leave
+
Open the route before leaving Irvine, 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 Irvine, CA
This is one driving day of about 386.1 miles and 7h 15m.
Your first comfortable stop window is around 85 miles from Irvine, 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.
Mid-route town
Meal stop
193 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 85 miles helps settle the day before fatigue starts building.
Meal break
The midpoint is around 193 miles from Irvine, 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.
These stop ideas are pacing suggestions — the exact town or exit can change with traffic, hotel plans, and fuel range.
Heads-up: tricky spots
5 of 275 decision points cluster between mile 6.3 and 128.5 — GPS handles the exact turns, but know they're coming. Your lane choice matters more than the turn itself.
8
6.3 mi into trip
|
~7m in
Take the exit toward CA 55 South, CA 55 North: Freeway
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 9A
Toward CA 55 South, CA 55 North: Freeway
7
6.5 mi into trip
|
~7m in
Keep slight right at fork toward CA 55 North
Highway fork - watch signs carefully. Lane positioning matters here
Use the slight left / slight right lanes.
Toward CA 55 North
7
10.6 mi into trip
|
~12m in
Take the exit toward I 5 North: Santa Ana
Exit ramp - move to the correct lane early. Lane positioning matters here
Use the straight / slight right lanes.
Exit 10B
Toward I 5 North: Santa Ana
9
68.6 mi into trip
|
~1h 19m in
|
I 5 Truck
Keep slight right at fork onto I 5 Truck toward I 5 Truck North, CA 14 Truck
Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one
Use the straight / slight right lanes.
Exit 161A
Toward I 5 Truck North, CA 14 Truck
7
128.5 mi into trip
|
~2h 28m 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 straight / slight right lanes.
Toward I 5 North
Fuel & Cost
Regular Gas
$87.97 one way
$175.93 round trip
$5.79/gal
25.4 MPG avg
135 kg CO2
| Fuel Type | $/gal | One Way | Round Trip |
|---|---|---|---|
| midgrade | $5.96 | $90.58 | $181.16 |
| premium | $6.14 | $93.33 | $186.67 |
| diesel | $5.97 | $90.70 | $181.41 |
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: 135.1 kg one way. Prices: EIA weekly data, 2026-09-07.
Driving Electric?
About $41 in charging · 1 stop · 67% less CO2
| Vehicle Type | kWh | Stops | DC Fast | Home Charge |
|---|---|---|---|---|
| Average EV | 115.8 | 1 | $40.54 | $18.53 |
| Efficient EV | 96.5 | 1 | $33.78 | $15.44 |
| EV Truck/SUV | 154.4 | 1 | $54.05 | $24.71 |
Gas CO2
135 kg
EV CO2
45 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
Discovery Bay, CA
Afternoon in Discovery Bay on Friday
Local time
4:58 PM
PDT
Current temp
--
Unavailable
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.
Road read
7h 15m 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.
Santa Monica Mountains National Recreation Area
National Recreation Area
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 66.6
View on nps.gov
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...
26 mi from route
~64 min detour
Free
near mile 386.1
View on nps.gov
César E. Chávez National Monument
National Monument
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
~68 min detour
Free
near mile 133.1
View on nps.gov
Park data from the National Park Service API. Alerts update every 2 hours.
What kind of drive is this?
386.1 mi in 7h 15m, mostly highway — 225.6 mi of that is on Westside Freeway.
96% highway — fuel and pacing are the main things to plan.
34 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 Golden State Freeway. This route has several spots where lane changes, forks, or exits need your full attention. The trickiest moment comes around 6.3 miles in.
Driving Effort
10/10
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 27 significant decision points across 386.1 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 6.3 miles: Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one; at 6.5 miles: Highway fork - watch signs carefully. Lane positioning matters here; at 10.6 miles: Exit ramp - move to the correct lane early. Lane positioning matters here.
Elevation Profile
Hilly terrain with moderate elevation changes
3,756 ft
11 ft
Total Climb
4,114 ft
Total Descent
4,156 ft
Highest Point
3,756 ft
~110.3 mi in
Elevation Range
3,745 ft
Notable High Points
3,756 ft at ~110.3 miles
+2,656 ft prominence
Towns Mentioned on Route Signs
Based on OSRM destination-sign hints, not a full list of every settlement the road passes.
Towns Mentioned on Route Signs
Based on OSRM destination-sign hints, not a full list of every settlement the road passes.
On the drive from Irvine, CA to Discovery Bay, CA, road signs begin pointing toward San Francisco along the way.
San Francisco
354.1 mi in
|
~6h 30m
|
via I 580
About the Cities
Starting in Irvine, CA
Full guide →Founded 1971
Irvine is a city of 308,000 people (2020) in Orange County, California. Irvine is one of the newest and largest cities in Orange County, and it is still growing. The city is a perfectly planned suburbia. The Irvine Company started developing the area in the 1960s and the city was formally incorporated on December 28, 1971.
Top landmarks
- • Pretend City Children's Museum — children's Museum in California, U.S.
Arriving in Discovery Bay, CA
Full guide →Founded 1964
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.
City content from Wikivoyage (CC BY-SA 4.0) and Wikidata (CC0).
Who Is This Route For?
Weekend Trip
Doable as a same-day drive at 7h 15m. Total distance: 386.1 miles.
Family Friendly
Moderate complexity with 2 natural rest stops along the way.
Solo Traveler
7h 15m 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.
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 Discovery Bay, 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: at 6.3 miles: Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one; at 6.5 miles: Highway fork - watch signs carefully. Lane positioning matters here; at 10.6 miles: Exit ramp - move to the correct lane early. Lane positioning matters here.
Yes — Santa Monica Mountains National Recreation Area, Port Chicago Naval Magazine National Memorial 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 7.3 hours each way, a round trip means 14.5 hours of driving — that is an unsafe level of fatigue for most drivers. Plan at least one night at Discovery Bay, CA before the return drive.
How this page is built
Compiled by the US Trip Planner planning team at COD Solutions Oy from open government datasets — OSRM over OpenStreetMap for geometry, EIA for fuel prices, USGS 3DEP for elevation, NPS for national parks, and FHWA TMAS for hourly traffic volumes. See our methodology for refresh cadence and limitations.
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