Blythe, CA to San Diego, CA is 216.8 miles and takes about 4h 7m via Kumeyaay Highway, Ben Hulse Highway, and CA 111, with a fuel budget near $50 and enough daylight to finish in a day. This single-day trip travels entirely within California, moving from the Pacific Coast region toward the same region. Expect a drive that involves frequent turns and local road segments, rather than a straightforward highway cruise. It's a practical option if you're looking for a direct, albeit somewhat winding, path to the coast without major detours.
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
1 planned break
Plan on a short reset every 3 to 4 hours to stay fresh behind the wheel.
Midpoint
108.4 miles from Blythe, CA
A natural place for your longest stop of the day
, about 2h 7m into the drive
.
Main Roads
Road
Distance
Duration
Kumeyaay Highway
96.5 mi
1h 44m
Ben Hulse Highway
69.4 mi
1h 19m
CA 111
14 mi
16m
Martin Luther King Junior Freeway
8.5 mi
9m
South Neighbours Boulevard
6.9 mi
7m
Mission Valley Freeway
6.8 mi
7m
28th Avenue
3 mi
3m
Pearl Harbor Memorial Highway
2.5 mi
2m
Longest stretch:
Kumeyaay Highway
— 96.5 mi, about 1h 44m
Traffic on I-8
Hour-of-day weekday pattern from 28 FHWA count stations on your route.
Peak
3 PM
~2,083 veh/hr typical
· worst 2,409
Quietest
2 AM
~121 veh/hr
Peak-to-quiet ratio
17.2×
busier at peak than in the quiet hours
12a6anoon6p11p
Averaged across 13 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 Blythe, CA and San Diego, CA.
1
Start on I 10 Business
273 ft·13 sec·East Hobsonway
2
Continue on I 10 Business
0.6 mi·1 min·East Hobsonway
3
Turn left onto South Lovekin Boulevard
0.2 mi·22 sec·South Lovekin Boulevard
4
Take the ramp
0.3 mi·37 sec
5
Merge onto I 10
2.5 mi·2 min·Pearl Harbor Memorial Highway
6
Take the exit
0.2 mi·37 sec
Toward SR-78 South
7
Turn left onto CA 78
6.9 mi·7 min·South Neighbours Boulevard
8
Turn right onto CA 78
3.0 mi·3 min·28th Avenue
9
Turn left onto CA 78
2.0 mi·2 min·Rannells Boulevard
10
Turn right onto CA 78
1.3 mi·1 min·32nd Avenue
Use the right lane.
11
Continue on CA 78
64 mi·1 hr 13 min·Ben Hulse Highway
12
At end of road, turn right onto CA 78; CA 115
5.5 mi·6 min·Ben Hulse Highway
13
Turn left onto CA 111
14 mi·16 min·CA 111
Use the left / straight lanes.
14
Take the exit
0.5 mi·1 min
15
Merge onto I 8
97 mi·1 hr 44 min·Kumeyaay Highway
Use the straight / slight right lanes.
16
Continue on I 8
6.8 mi·7 min·Mission Valley Freeway
Use the straight / slight right lanes.
17
Take the exit
0.2 mi·20 sec
Exit 14BToward CA 125Use the straight / slight right lanes.
18
Keep slight left at fork
0.6 mi·1 min
Toward CA 125 South
19
Merge onto CA 125
1.7 mi·1 min·CA 125
Use the straight / slight right lanes.
20
Take the exit
0.4 mi·53 sec
Exit 15Toward CA 94 West
21
Merge onto CA 94
8.5 mi·9 min·Martin Luther King Junior Freeway
Use the straight / slight right lanes.
22
Turn right onto 16th Street
0.1 mi·24 sec·16th Street
Use the right lane.
23
Turn left onto Broadway
0.9 mi·1 min·Broadway
Use the left lane.
24
Turn left onto Front Street
26 ft·0 sec·Front Street
Use the left lane.
25
Arrive at destination
Front Street
Trip Plan
Given the 4h 7m estimated drive time, you can comfortably complete this trip in one day. Aim to depart in the morning to allow ample daylight for the driving, especially considering the 'turn-heavy' nature of the route. While the drive is under 5 hours, the longest stretch is over 96 miles, so plan for a single fuel stop if needed, likely before you begin the longest segment on Kumeyaay Highway. Keep an eye on your navigation, as the frequent turns mean it's easy to miss a crucial exit.
Morning Departure
An early start around 7-8 AM gets you there with plenty of daylight left.
Evening Departure
A late afternoon start means arriving after dark. Morning is better.
You can normally do this drive in one day.
Plan roughly 1 meaningful break for fuel, food, and rest.
The halfway point lands around 108.4 miles from Blythe, CA, or about 2h 7m into the drive.
The longest continuous stretch on this route runs about 96.5 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 48 miles or 57m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 108.4 miles or 2h 7m in
This is the best place for your longest stop, a real meal, and a full fuel check.
Final approach
Final hour starts around 3h 22m
Traffic, exits, and arrival timing usually matter more near San Diego, CA than in the middle of the route.
Before You Leave
+
Open the route before leaving Blythe, 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.
Day 1
Settle into the route from Blythe, CA
This is one driving day of about 216.8 miles and 4h 7m.
Your first comfortable stop window is around 48 miles from Blythe, CA.
This route can stay practical as a one-day drive if traffic stays reasonable.
Plan about 1 real break rather than only quick fuel stops.
The longest stretch is on Kumeyaay Highway for about 96.5 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 20
5 decision points cluster between mile 15.8 and 216.7 — GPS handles the exact turns, but know they're coming. Your lane choice matters more than the turn itself.
5
15.8 mi into trip|~20m in|CA 78 / 32nd Avenue
Turn right onto CA 78 / 32nd Avenue
Lane positioning matters here
Use the right lane.
7
204.3 mi into trip|~3h 51m in
Take the exit toward CA 125
Exit ramp - move to the correct lane early. Lane positioning matters here
Use the straight / slight right lanes.
Exit 14B
Toward CA 125
6
215.7 mi into trip|~4h 5m in|16th Street
Turn right onto 16th Street
Lane positioning matters here
Use the right lane.
6
215.9 mi into trip|~4h 5m in|Broadway
Turn left onto Broadway
Lane positioning matters here
Use the left lane.
6
216.7 mi into trip|~4h 7m in|Front Street
Turn left onto Front Street
Lane positioning matters here
Use the left lane.
Fuel & Cost
Regular Gas
$45.36 one way
$90.71 round trip
$5.31/gal25.4 MPG avg76 kg CO2
Fuel Type
$/gal
One Way
Round Trip
midgrade
$5.52
$47.11
$94.21
premium
$5.67
$48.35
$96.71
diesel
$4.80
$40.94
$81.87
No toll roads detected on this route.
Estimated Trip Cost (one way, 1 person)
Fuel
$45
Meals
$25–$50
Total
$70–$95
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 75.9 kg one way.
Prices: EIA weekly data, 2026-07-13.
Driving Electric?
About $23 in charging
· 0 stops
· 67% less CO2
Vehicle Type
kWh
Stops
DC Fast
Home Charge
Average EV
65
0
$22.76
$10.41
Efficient EV
54.2
0
$18.97
$8.67
EV Truck/SUV
86.7
1
$30.35
$13.88
Gas CO2
76 kg
EV CO2
25 kg (67% less)
Plan for 0 charging stops, roughly every 270 miles. Allow 25-40 minutes per stop at a DC fast charger.
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 Jul 18, 2026
Origin
Blythe, CA
Late night
in Blythe on Sunday
Local time
3:55 AM
PDT
Current temp
106°F
Sunny
SSE 10 mph2% chanceLive forecast
Beach Hazards Statement
Beach Hazards Statement issued July 18 at 12:55PM PDT until July 21 at 11:00PM PDT by NWS Los Angeles/Oxnard CA
Destination
San Diego, CA
Late night
in San Diego on Sunday
Local time
3:55 AM
PDT
Current temp
79°F
Sunny
SW 5 to 10 mph2% chanceLive forecast
Beach Hazards Statement
Beach Hazards Statement issued July 18 at 12:55PM PDT until July 21 at 11:00PM PDT by NWS Los Angeles/Oxnard CA
51°F
Alpine, CA
108 mi in
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
27 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
4h 7m on the road
An early start around 7-8 AM gets you there with plenty of daylight left.
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.
Cabrillo National Monument
National Monument
In 1542, Juan Rodriguez Cabrillo climbed out of his boat and onto shore, becoming the first European to set foot on what is now the West Coast of the United States. Cabrillo National Monument not only...
5 mi from route
~13 min detour
$20
near mile 216.8
Park data from the National Park Service API. Alerts update every 2 hours.
More Details
What kind of drive is this?
This route is characterized as a 'turn-heavy local drive,' meaning you'll navigate through various local roads and highways with a significant number of turns. Only 14% of the journey is on highways, so be prepared for a more engaged driving experience. The longest uninterrupted stretch you'll encounter is 96.5 miles along the Kumeyaay Highway. As you progress, the road will transition, offering a mix of faster sections and more intricate local driving segments, so keep your attention sharp.
Only 14% highway — the rest is turn-by-turn surface driving.
25 navigation steps total — most of the decisions cluster near the start and finish.
Longest single stretch: 96.5 mi on Kumeyaay Highway.
How Hard Is This Drive?
8/10
Expect a hands-on drive with frequent turns and local roads rather than long highway stretches. This route has several spots where lane changes, forks, or exits need your full attention. The trickiest moment comes around 15.8 miles in near CA 78 / 32nd Avenue.
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 20 significant decision points across 216.8 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 15.8 miles (CA 78 / 32nd Avenue): Lane positioning matters here; at 204.3 miles: Exit ramp - move to the correct lane early. Lane positioning matters here; at 215.7 miles (16th Street): Lane positioning matters here.
Elevation Profile
Hilly terrain with moderate elevation changes
3,888 ft-134 ft
Total Climb
4,866 ft
Total Descent
5,095 ft
Highest Point
3,888 ft
~154.8 mi in
Elevation Range
4,022 ft
Notable High Points
1,086 ft at ~46.4 miles+693 ft prominence
Detours Along the Way
Tagged by where each one fits in your drive — first break, midpoint, final stretch.
From balmy beaches with a laid-back attitude to a gleaming modern image, San Diego offers much for the tourist to enjoy. Situated on the Southern California seacoast, San Diego is the second largest city in the state, with 1.4 million residents (2020), and has long attracted travelers for its ideal climate, miles of beaches, and location on the Mexican border right across from Tijuana.
But there's much more here than surfer culture and a quick hop across the border. A rich maritime and military heritage lives on in San Diego, which is home to the Pacific Fleet of the United States Navy. The city has also become known for its part in the wildlife conservation movement, owing to the presence of the world-renowned San Diego Zoo and Safari Park and the Scripps Institution of Oceanography. Natural scenery abounds from rocky tidepools and seaside cliffs to desert hills and canyons inland.
Top landmarks
•Balboa Park — historic park in San Diego, California
•Cabrillo National Monument — National Monument of the United States and historic district
Doable as a same-day drive at 4h 7m. Total distance: 216.8 miles.
Family Friendly
Moderate complexity with 1 natural rest stops along the way.
Solo Traveler
4h 7m drive, comfortable solo distance.
Scenic Drive
Mostly surface roads route profile with national parks nearby.
Frequently Asked Questions
The longest stretch is about 96.5 miles on Kumeyaay Highway. The full list of main roads is in the Roads section above.
Yes — we found about 6 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 San Diego, 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 1 meaningful breaks. There are 6 rest areas along the route for bathroom stops.
The main spots that need attention: at 15.8 miles (CA 78 / 32nd Avenue): Lane positioning matters here; at 204.3 miles: Exit ramp - move to the correct lane early. Lane positioning matters here; at 215.7 miles (16th Street): Lane positioning matters here.
Yes — Cabrillo National Monument. See the National Parks section for detour distances and tips on detours.
Possible but tiring. At 4.1 hours each way, an in-and-out day trip would put you behind the wheel for 8.3 hours — manageable with a long break at San Diego, CA, but most travelers stay overnight.
