Best Time to Drive from Lake Forest to San Marcos

Right now (3:20 pm PST): about 98 minutes via I-5 South and SR-78 East, usually 66 at this time.

Only 16% of this drive is measured by working traffic sensors right now. The rest is estimated from nearby sensors, typical speeds and street traffic, so times can be off. Why so few sensors work.

Typical drive time by departure time

Minutes from Lake Forest to San Marcos by day and time you leave (local time)
Leave	5am	6am	7am	8am	9am	10am	11am	12pm	1pm	2pm	3pm	4pm	5pm	6pm	7pm	8pm	9pm
Mon	52	54	55	55	55	55	55	55	54	55	55	56	53	53	53	53	52
Tue	53	56	58	58	55	58	56	56	55	56	56	58	54	55	53	54	53
Wed	52	57	58	56	56	57	56	56	55	57	58	59	57	54	54	54	53
Thu	52	57	59	56	55	58	59	57	56	60	63	63	57	55	55	55	52
Fri	52	56	56	57	55	61	64	69	79	79	81	83	78	68	65	54	53
Sat	53	53	53	54	65	73	75	76	72	65	66	78	61	56	54	53	52
Sun	53	52	53	52	54	56	62	60	59	59	58	58	56	55	55	55	53

About this drive

On weekdays the 57-mile drive from Lake Forest to San Marcos (via I-5 South and SR-78 East) usually takes as little as 52 minutes and up to 83 minutes, when leaving around 4 pm on Fridays. The fastest times to leave are before 6:30 am or after 6 pm. Midday (11 am to 2 pm) it takes about 59 minutes. On weekends it is slowest around 10:30 am on Saturdays (87 minutes).

About 49 miles of it is freeway, where times follow typical and live traffic from our sensors, and about 8 miles surface streets (10 to 19 minutes on weekdays), estimated from how jammed the freeways around them are at that time. Drive times are measured from central Lake Forest to central San Marcos along the route on the map. Starting or ending elsewhere in a big city can add or save several minutes.

Simulated from typical freeway speeds at each point of the drive for the time you would reach it, from every 5-minute reading we have recorded. We don't have sensors on surface streets yet, so the time on them is estimated from how congested the freeways around each end of the drive are at that time, in both directions: streets jam when the freeways do.

Questions

What is the best time to drive from Lake Forest to San Marcos?

On weekdays, leave before 6:30 am or after 6 pm. The drive usually takes about 52 minutes then, versus up to 83 minutes at the worst times.

How long does it take to drive from Lake Forest to San Marcos?

The 57-mile drive usually takes 52 to 83 minutes on weekdays, depending on when you leave, and about 59 minutes midday.

When is traffic worst from Lake Forest to San Marcos?

Leaving around 4 pm on Fridays is usually slowest, about 83 minutes.

Freeways on this drive

I-5 South in Orange County (22 miles) · I-5 South in San Diego (17 miles) · SR-78 East in San Diego (10 miles)

Orange County traffic right now · Orange County traffic tomorrow · San Diego traffic right now · San Diego traffic tomorrow

More drives

San Marcos to Lake Forest (return trip) · Lake Forest to Los Angeles · Lake Forest to Moreno Valley · Lake Forest to Long Beach · Lake Forest to Anaheim · Lake Forest to Riverside · Lake Forest to Santa Ana · Lake Forest to Irvine · Lake Forest to San Bernardino · Lake Forest to Fontana · Lake Forest to Huntington Beach · Lake Forest to Glendale

Open the live traffic map →

Leave	5am	6am	7am	8am	9am	10am	11am	12pm	1pm	2pm	3pm	4pm	5pm	6pm	7pm	8pm	9pm
Mon	52	54	55	55	55	55	55	55	54	55	55	56	53	53	53	53	52
Tue	53	56	58	58	55	58	56	56	55	56	56	58	54	55	53	54	53
Wed	52	57	58	56	56	57	56	56	55	57	58	59	57	54	54	54	53
Thu	52	57	59	56	55	58	59	57	56	60	63	63	57	55	55	55	52
Fri	52	56	56	57	55	61	64	69	79	79	81	83	78	68	65	54	53
Sat	53	53	53	54	65	73	75	76	72	65	66	78	61	56	54	53	52
Sun	53	52	53	52	54	56	62	60	59	59	58	58	56	55	55	55	53

Leave	5am	6am	7am	8am	9am	10am	11am	12pm	1pm	2pm	3pm	4pm	5pm	6pm	7pm	8pm	9pm
Mon	52	54	55	55	55	55	55	55	54	55	55	56	53	53	53	53	52
Tue	53	56	58	58	55	58	56	56	55	56	56	58	54	55	53	54	53
Wed	52	57	58	56	56	57	56	56	55	57	58	59	57	54	54	54	53
Thu	52	57	59	56	55	58	59	57	56	60	63	63	57	55	55	55	52
Fri	52	56	56	57	55	61	64	69	79	79	81	83	78	68	65	54	53
Sat	53	53	53	54	65	73	75	76	72	65	66	78	61	56	54	53	52
Sun	53	52	53	52	54	56	62	60	59	59	58	58	56	55	55	55	53

Leave	5am	6am	7am	8am	9am	10am	11am	12pm	1pm	2pm	3pm	4pm	5pm	6pm	7pm	8pm	9pm
Mon	52	54	55	55	55	55	55	55	54	55	55	56	53	53	53	53	52
Tue	53	56	58	58	55	58	56	56	55	56	56	58	54	55	53	54	53
Wed	52	57	58	56	56	57	56	56	55	57	58	59	57	54	54	54	53
Thu	52	57	59	56	55	58	59	57	56	60	63	63	57	55	55	55	52
Fri	52	56	56	57	55	61	64	69	79	79	81	83	78	68	65	54	53
Sat	53	53	53	54	65	73	75	76	72	65	66	78	61	56	54	53	52
Sun	53	52	53	52	54	56	62	60	59	59	58	58	56	55	55	55	53