Trip from San Diego, CA to Grossmont, CA

Q: How long is the trip from San Diego, CA to Grossmont, CA?

The drive from San Diego, CA to Grossmont, CA covers 12.7 miles and takes about 17m without stops. Add 15-30 minutes for a fuel or rest stop on longer drives.

Q: What are the main roads on this route?

The main roads are Martin Luther King Junior Freeway, CA 125, West Broadway. Most of the drive stays on highways, so watch for ramps and exits.

Q: Is this a good same-day trip?

This is a comfortable same-day trip.

Q: Where should I stop halfway?

The midpoint is about 6.3 miles from San Diego, CA. Look for rest areas, gas stations, or food options near the halfway mark.

Q: How much does gas cost for this trip?

At current regular gas prices, expect to spend about $2.92 one way. This estimate uses 25.4 MPG — your actual cost will vary with your vehicle's fuel efficiency and current gas prices.

Q: What is the best time to leave?

Leave by 9 AM and you'll arrive before lunch. Even a 4 PM departure gets you there before dark in summer.

Q: What towns show up on signs driving from San Diego, CA to Grossmont, CA?

The route from San Diego, CA to Grossmont, CA does not surface many named destination signs beyond the main corridor.

Last recalculated Apr 16, 2026

Drive Time

17m

Distance

12.7 mi

20 km

Drive Score

6/10

Good drive

Same Day?

Yes, doable

Fuel Cost

$3

one way

EV Charging

Unknown

Best Time to Leave

4 AM

0h 16m ★

6 AM

0h 17m

8 AM

0h 20m

10 AM

0h 18m

12 PM

0h 18m

3 PM

0h 18m

5 PM

0h 20m

8 PM

0h 16m ★

Estimated drive times based on typical traffic patterns. Actual times may vary with weather, construction, and real-time conditions.

Best Time Drive vs Fly

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Trip Overview

This 12.7-mile drive from San Diego to Grossmont, California, is a quick 17-minute trip that's perfect for a single day. Focusing heavily on highways, with 81% of the route on such roads, it's a straightforward journey. You'll primarily navigate the Martin Luther King Junior Freeway and CA 125 before transitioning to West Broadway. Given the short distance and duration, no overnight stay is necessary. Budget around $3 for fuel, making this an economical option for a local excursion within the Pacific Coast region. It's a convenient option for getting from one part of the metro area to another without a significant time commitment.

Who Is This Route For?

Weekend Trip

Doable as a same-day drive at 17m. Total distance: 12.7 miles.

Family Friendly

Moderate complexity with 0 natural rest stops along the way.

Solo Traveler

17m drive, comfortable solo distance.

EV Driver

0 DC fast chargers along the route. Coverage: unknown.

First-Time Driver

Mostly highway driving (81%). Some complex stretches to watch for.

Drive Character

Expect a highway-focused drive for the majority of this route, accounting for 81% of the total mileage. The longest uninterrupted stretch you'll encounter is 8.6 miles along the Martin Luther King Junior Freeway, offering a consistent pace. As you progress, you'll transition from faster freeway driving to West Broadway, which will likely involve more local traffic and potentially lower speeds. This route offers a blend of efficient highway travel and a brief experience on a more surface-level road as you near your destination.

Most of the miles stay on highways, which makes pacing and fuel planning easier than turn-by-turn city driving.

There are about 11 navigation steps in the underlying route data, so the final approach matters more than the middle miles.

Martin Luther King Junior Freeway is the longest continuous segment at about 8.6 miles.

How Hard Is This Drive?

This is a straightforward highway drive that stays mostly on Martin Luther King Junior Freeway and CA 125. You will hit about 7 points where you need to pay attention to lane position or signs. The trickiest moment comes early in the drive near West Broadway.

Driving Effort 6/10

Moderate - straightforward overall, but long enough or busy enough to require pacing

Balances navigation complexity with total wheel time.

This drive requires moderate attention. Across 12.7 miles you will encounter 7 spots where lane choice or exit timing matters. Not difficult for experienced highway drivers, but worth previewing the tricky sections before you go.

Where does it get tricky?

The main spots that need attention: near the start (West Broadway): Navigation decision point; at 1.1 miles (G Street): Lane positioning matters here; at 9.3 miles (Martin Luther King Junior Freeway): Highway fork - watch signs carefully. Lane positioning matters here.

Critical Maneuvers

5 of 7 key points

These are the spots where you need to pay the most attention. Preview them before you drive.

4

0 mi into trip | ~0m in | West Broadway

Turn left onto West Broadway

Navigation decision point

6

1.1 mi into trip | ~2m in | G Street

Turn left onto G Street

Lane positioning matters here

Use the left lane.

7

9.3 mi into trip | ~11m in | Martin Luther King Junior Freeway

Keep slight left at fork onto Martin Luther King Junior Freeway toward CA 125 North

Highway fork - watch signs carefully. Lane positioning matters here

Use the slight left / slight right lanes. Toward CA 125 North

7

11.5 mi into trip | ~13m in

Take the exit toward Grossmont Boulevard

Exit ramp - move to the correct lane early. Lane positioning matters here

Use the straight / slight right lanes. Exit 18A Toward Grossmont Boulevard

6

11.7 mi into trip | ~14m in | Grossmont Boulevard

Turn right onto Grossmont Boulevard

Lane positioning matters here

Use the straight / left / right lanes.

Main Roads

Road	Distance	Duration
Martin Luther King Junior Freeway	8.6 mi	9m
CA 125	1.8 mi	1m
West Broadway	0.9 mi	1m
Grossmont Boulevard	0.9 mi	2m
16th Street	0.2 mi	<1m
Grossmont Summit Drive	0.1 mi	<1m
G Street	<0.1 mi	<1m
Front Street	<0.1 mi	<1m

Longest stretch: Martin Luther King Junior Freeway — 8.6 mi, about 9m

Turn-by-Turn Driving Directions

Step-by-step road directions between San Diego, CA and Grossmont, CA.

1

Start on Front Street

26 ft · 6 sec · Front Street

2

Turn left onto West Broadway

0.9 mi · 1 min · West Broadway

3

Turn right onto 16th Street

0.2 mi · 34 sec · 16th Street

4

Turn left onto G Street

278 ft · 9 sec · G Street

Use the left lane.

5

Continue on CA 94

8.2 mi · 8 min · Martin Luther King Junior Freeway

Use the straight / slight right lanes.

6

Keep slight left at fork onto Martin Luther King Junior Freeway

0.4 mi · 25 sec · Martin Luther King Junior Freeway

Toward CA 125 North Use the slight left / slight right lanes.

7

Continue on CA 125

1.8 mi · 1 min · CA 125

Use the straight / slight right lanes.

8

Take the exit

0.2 mi · 30 sec

Exit 18A Toward Grossmont Boulevard Use the straight / slight right lanes.

9

Turn right onto Grossmont Boulevard

0.9 mi · 2 min · Grossmont Boulevard

Use the straight / left / right lanes.

10

Turn right onto Grossmont Summit Drive

0.1 mi · 28 sec · Grossmont Summit Drive

11

Arrive at destination

Shadow Road

Fuel & Cost

Regular Gas

$2.92 one way

$5.84 round trip

$5.84/gal 25.4 MPG avg 4 kg CO₂

Fuel Type	$/gal	One Way	Round Trip
midgrade	$6.02	$3.01	$6.02
premium	$6.18	$3.09	$6.18
diesel	$5.61	$2.80	$5.61

No toll roads detected on this route.

Drive Cost (one way)

Fuel

$3

Estimated CO2 emission: 4.4 kg one way. Prices: EIA weekly data, 2026-04-13.

Driving Electric?

About $1 in charging · 0 stops · 75% less CO₂

Vehicle Type	kWh	DC Fast	Home Charge
Average EV	3.8	$1.33	$0.61
Efficient EV	3.2	$1.11	$0.51
EV Truck/SUV	5.1	$1.78	$0.81

Gas CO2

4 kg

EV CO2

1 kg (75% less)

This trip is well within single-charge range for most EVs. No charging stops needed if you start fully charged.

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 15, 2026

Origin

San Diego, CA

Morning in San Diego on Thursday

Local time

10:44 AM

PDT

Current temp

56°F

Unavailable

Live forecast

Destination

Grossmont, CA

Morning in Grossmont on Thursday

Local time

10:44 AM

PDT

Current temp

81°F

Unavailable

Live forecast

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

25 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

17m on the road

Use the two city cards together: check the sky where you start, then compare it with the local time and temperature at arrival.

Weather data from the National Weather Service. Conditions may change; check closer to your travel date.

Frequently Asked Questions

The drive from San Diego, CA to Grossmont, CA covers 12.7 miles and takes about 17m without stops. Add 15-30 minutes for a fuel or rest stop on longer drives.

The main roads are Martin Luther King Junior Freeway, CA 125, West Broadway. Most of the drive stays on highways, so watch for ramps and exits.

This is a comfortable same-day trip.

The midpoint is about 6.3 miles from San Diego, CA. Look for rest areas, gas stations, or food options near the halfway mark.

At current regular gas prices, expect to spend about $2.92 one way. This estimate uses 25.4 MPG — your actual cost will vary with your vehicle's fuel efficiency and current gas prices.

Leave by 9 AM and you'll arrive before lunch. Even a 4 PM departure gets you there before dark in summer.

This drive requires moderate attention. Across 12.7 miles you will encounter 7 spots where lane choice or exit timing matters. Not difficult for experienced highway drivers, but worth previewing the tricky sections before you go.

The main spots that need attention: near the start (West Broadway): Navigation decision point; at 1.1 miles (G Street): Lane positioning matters here; at 9.3 miles (Martin Luther King Junior Freeway): Highway fork - watch signs carefully. Lane positioning matters here.

The route from San Diego, CA to Grossmont, CA does not surface many named destination signs beyond the main corridor.

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