San Diego, CA to Mount Hermon, CA is 469.1 miles and takes about 9h 4m via I-5 N, with a fuel budget near $108 and enough daylight to finish in a day if you start early. This is a highway-focused drive that stays within California, moving from the Pacific Coast region north towards the same region. With a recommended 2-day trip, you'll have plenty of time to break up the 9-hour journey. It's a straightforward route, largely on major interstates, making it a practical option for reaching your destination efficiently.
Trip Pace
Best split across 2 days
Treat the return leg as its own travel day rather than an afterthought.
Break Rhythm
2 planned breaks
Plan on a short reset every 3 to 4 hours to stay fresh behind the wheel.
Midpoint
234.5 miles from San Diego, CA
A natural place for your longest stop of the day
, about 4h 32m into the drive
.
Main Roads
Road
Distance
Duration
Westside Freeway
182.5 mi
3h 15m
San Diego Freeway
75.2 mi
1h 27m
Golden State Freeway
50 mi
57m
I 5 Truck
45.3 mi
52m
CA 152
36.1 mi
43m
Santa Ana Freeway
30.4 mi
35m
Cabrillo Highway
14.5 mi
16m
Riverside Road
9.5 mi
13m
Longest stretch:
Westside Freeway
— 182.5 mi, about 3h 15m
Turn-by-Turn Driving Directions
Step-by-step road directions between San Diego, CA and Mount Hermon, CA.
1
Start on Front Street
26 ft·6 sec·Front Street
2
Turn left onto West Broadway
290 ft·12 sec·West Broadway
3
Turn left onto 1st Avenue
0.6 mi·1 min·1st Avenue
Use the left lane.
4
Take the ramp
0.2 mi·24 sec
Toward I 5 North: Los AngelesUse the left / straight lanes.
5
Merge onto I 5
13 mi·15 min·San Diego Freeway
Use the straight / slight right lanes.
6
Keep slight left at fork onto I 5
36 mi·43 min·San Diego Freeway
Use the straight / slight right lanes.
7
Keep slight right at fork onto I 5
18 mi·20 min·San Diego Freeway
Use the straight / slight right lanes.
8
Keep slight left at fork onto I 5
7.4 mi·8 min·San Diego Freeway
Use the straight / slight right lanes.
9
Keep slight right at fork onto I 5 Truck
1.6 mi·1 min·I 5 Truck
Toward Bake ParkwayUse the straight / slight right lanes.
10
Keep slight right at fork onto I 5 Truck
6.0 mi·6 min·I 5 Truck
Use the slight right lane.
11
Take the exit
0.2 mi·16 sec
Exit 100Toward Jamboree RoadUse the slight right lane.
12
Continue on this road
527 ft·11 sec·this road
13
Turn right onto Jamboree Road
0.1 mi·18 sec·Jamboree Road
Use the left / right lanes.
14
Turn left onto El Camino Real
2.2 mi·4 min·El Camino Real
Use the left lane.
15
Turn left onto Newport Avenue
357 ft·13 sec·Newport Avenue
Use the left lane.
16
Take the ramp
0.2 mi·16 sec
Toward I 5 North: Los Angeles
17
Merge onto I 5
1.3 mi·1 min·Santa Ana Freeway
Use the straight / slight right lanes.
18
Keep slight right at fork onto I 5
1.7 mi·1 min·Santa Ana Freeway
19
Keep slight right at fork onto I 5
9.4 mi·10 min·Santa Ana Freeway
Use the slight right lane.
20
Keep slight right at fork onto I 5
18 mi·20 min·Santa Ana Freeway
Use the straight / slight right lanes.
21
Keep slight right at fork onto I 5
25 mi·29 min·Golden State Freeway
Use the straight / slight right lanes.
22
Keep slight left at fork onto I 5
2.2 mi·2 min·Golden State Freeway
Use the straight / slight right lanes.
23
Keep slight right at fork onto I 5 Truck
1.5 mi·1 min·I 5 Truck
Exit 161AToward I 5 Truck North, CA 14 TruckUse the straight / slight right lanes.
24
Keep slight left at fork onto I 5 Truck
36 mi·41 min·I 5 Truck
Use the straight / slight right lanes.
25
Keep slight left at fork onto I 5
22 mi·25 min·Golden State Freeway
Use the straight / slight right lanes.
26
Keep slight right at fork onto I 5
183 mi·3 hr 15 min·Westside Freeway
Toward I 5 NorthUse the straight / slight right lanes.
27
Take the exit
0.2 mi·26 sec
Exit 403BToward CA 152 West: Gilroy, Hollister, San Jose
28
Continue on CA 152; CA33
29 mi·33 min·CA 152; CA33
Use the straight lane.
29
Keep slight right at fork onto CA 152
7.4 mi·10 min·CA 152
30
Turn left onto CR G7
3.2 mi·4 min·Bloomfield Avenue
31
At end of road, turn right onto CA 25
0.9 mi·1 min·Bloomfield Avenue
32
Take the ramp
0.2 mi·15 sec
33
Merge onto US 101
2.9 mi·3 min·South Valley Freeway
34
Continue on US 101
2.3 mi·2 min·El Camino Real
35
Take the exit
0.3 mi·18 sec
Exit 347Toward CA 129 West: Watsonville, Santa Cruz
36
Turn right onto CA 129
2.5 mi·3 min·Chittenden Road
37
Continue on CA 129
8.6 mi·11 min·Riverside Road
38
Enter roundabout onto CA 129
144 ft·2 sec·Riverside Road
39
Continue on CA 129
0.9 mi·1 min·Riverside Road
40
Turn right onto Blackburn Street
0.4 mi·1 min·Blackburn Street
41
At end of road, turn left onto CA 152
0.5 mi·54 sec·East Lake Avenue
42
Turn right onto CA 152
0.3 mi·30 sec·Main Street
43
Turn left onto CA 152
1.6 mi·2 min·Main Street
44
Take the ramp
0.2 mi·30 sec
45
Merge onto CA 1
14 mi·16 min·Cabrillo Highway
46
Keep slight left at fork onto CA 17
0.3 mi·35 sec·Santa Cruz Highway
47
Take the exit
179 ft·5 sec
48
Turn right onto Ocean Street
0.3 mi·39 sec·Ocean Street
49
Turn straight onto Graham Hill Road
5.1 mi·9 min·Graham Hill Road
50
Turn right onto Roaring Camp Road
0.1 mi·33 sec·Roaring Camp Road
51
Turn right onto Conference Drive
0.4 mi·1 min·Conference Drive
52
Arrive at destination
Conference Drive
Trip Plan
Given the 9h 4m duration, splitting this drive over 2 days is a smart move to avoid fatigue. Consider departing San Diego early to maximize daylight for the first leg. You'll have 2 planned stops, so use them strategically to refuel and stretch your legs. Keep an eye on your fuel gauge, especially during the 182.5-mile stretch on the Westside Freeway, as services can be spaced out. The $108 fuel cost is an estimate, so always factor in potential price variations.
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.
This drive is better paced as a 2-day trip.
Plan roughly 2 meaningful breaks for fuel, food, and rest.
The halfway point lands around 234.5 miles from San Diego, CA, or about 4h 32m into the drive.
The longest continuous stretch on this route runs about 182.5 miles.
Consider an overnight stop or starting very early.
Departure
Before you leave
Start with fuel, water, and navigation already sorted so the first hour feels easy.
First stop
Around 103 miles or 2h 3m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 234.5 miles or 4h 32m in
This is the best place for your longest stop, a real meal, and a full fuel check.
Overnight split
Day 1 wrap after about 234.5 miles or 4h 32m
Stop before fatigue turns the last few hours into a grind. You want day two to start fresh, not just resumed.
Final approach
Final hour starts around 7h 41m
Traffic, exits, and arrival timing usually matter more near Mount Hermon, CA than in the middle of the route.
Before You Leave
+
Open the route before leaving San Diego, 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.
+
Treat this as a 2-day road trip and book the overnight stop before the busiest arrival window.
Day 1
Settle into the route from San Diego, CA
Aim for roughly 235 miles and 4.5 hours of wheel time on this day.
Day 2
Finish the approach into Mount Hermon, CA
Aim for roughly 235 miles and 4.5 hours of wheel time on this day.
Your first comfortable stop window is around 103 miles from San Diego, CA.
This route usually feels better as a 2-day drive than as one long push.
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.
Place data sourced from public business listings. Hours and availability may vary.
Heads-up: tricky spots
5 of 41
5 decision points cluster between mile 76.1 and 204.7 — GPS handles the exact turns, but know they're coming. Your lane choice matters more than the turn itself.
7
76.1 mi into trip|~1h 29m in|I 5 Truck
Keep slight right at fork onto I 5 Truck toward Bake Parkway
Highway fork - watch signs carefully. Lane positioning matters here
Use the straight / slight right lanes.
Toward Bake Parkway
7
83.7 mi into trip|~1h 38m in
Take the exit toward Jamboree Road
Exit ramp - move to the correct lane early. Lane positioning matters here
Use the slight right lane.
Exit 100
Toward Jamboree Road
7
84 mi into trip|~1h 39m in|Jamboree Road
Turn right onto Jamboree Road
Lane positioning matters here
Use the left / right lanes.
9
144.7 mi into trip|~2h 52m 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
204.7 mi into trip|~4h 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
$107.82 one way
$215.64 round trip
$5.84/gal25.4 MPG avg164 kg CO2
Fuel Type
$/gal
One Way
Round Trip
midgrade
$6.02
$111.11
$222.21
premium
$6.18
$114.08
$228.16
diesel
$5.61
$103.57
$207.14
No toll roads detected on this route.
Estimated Trip Cost (one way, 1 person)
Fuel
$108
Hotel (1n)
$80–$140
Meals
$50–$100
Total
$238–$348
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 164.1 kg one way.
Prices: EIA weekly data, 2026-04-13.
Driving Electric?
About $49 in charging
· 1 stop
· 66% less CO2
Vehicle Type
kWh
Stops
DC Fast
Home Charge
Average EV
140.7
1
$49.26
$22.52
Efficient EV
117.3
1
$41.05
$18.76
EV Truck/SUV
187.6
2
$65.67
$30.02
Gas CO2
164 kg
EV CO2
55 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
San Diego, CA
Late night
in San Diego on Tuesday
Local time
5:02 AM
PDT
Current temp
58°F
Unavailable
Live forecast
Destination
Mount Hermon, CA
Late night
in Mount Hermon on Tuesday
Local time
5:02 AM
PDT
Current temp
49°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.
For long drives, weather on day two can matter just as much as conditions at departure, so check the whole travel window rather than only the first day.
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
9 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
9h 4m on the road
This is long enough that the arrival forecast matters almost as much as departure conditions. Recheck both ends before you roll.
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
Park Closure: Park Auditorium Closed Until Further Notice
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 145.6
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...
28 mi from route
~69 min detour
Free
near mile 210.3
Park data from the National Park Service API. Alerts update every 2 hours.
More Details
What kind of drive is this?
This route is predominantly a highway-focused drive, with 90% of the journey utilizing major freeways like the Westside Freeway and San Diego Freeway. You'll encounter the longest uninterrupted stretch at 182.5 miles on the Westside Freeway, meaning extended periods of consistent speed. While the profile is largely highway, expect the character to shift as you traverse different sections of California's extensive freeway network. It's designed for efficient travel, prioritizing directness over winding scenic byways.
90% highway — fuel and pacing are the main things to plan.
52 navigation steps total — most of the decisions cluster near the start and finish.
Longest single stretch: 182.5 mi on Westside Freeway.
How Hard Is This Drive?
10/10
This is a straightforward highway drive that stays mostly on Westside Freeway and San Diego Freeway. This route has several spots where lane changes, forks, or exits need your full attention. The trickiest moment comes around 76.1 miles in near I 5 Truck.
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 41 significant decision points across 469.1 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 76.1 miles (I 5 Truck): Highway fork - watch signs carefully. Lane positioning matters here; at 83.7 miles: Exit ramp - move to the correct lane early. Lane positioning matters here; at 84 miles (Jamboree Road): Lane positioning matters here.
Towns Mentioned on Route Signs
Based on OSRM destination-sign hints, not a full list of every settlement the road passes.
Between San Diego, CA and Mount Hermon, CA, road signs point toward Hollister, San Jose and Santa Cruz.
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
The longest stretch is about 182.5 miles on Westside Freeway. The full list of main roads is in the Roads section above.
Yes — a 2-day pace is more comfortable than one long haul. A sensible stopping point is after roughly 235 miles on day one.
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 Mount Hermon, 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 76.1 miles (I 5 Truck): Highway fork - watch signs carefully. Lane positioning matters here; at 83.7 miles: Exit ramp - move to the correct lane early. Lane positioning matters here; at 84 miles (Jamboree Road): Lane positioning matters here.
Yes — Cabrillo National Monument, 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 9.1 hours each way, a round trip means 18.1 hours of driving — that is an unsafe level of fatigue for most drivers. Plan at least one night at Mount Hermon, CA before the return drive.
