Best Time to Drive from Rancho Cucamonga to Lake Forest

Right now (7:09 pm PDT): about 53 minutes via I-15 South and SR-241 South and SR-91 West, usually 48 at this time.

Only 31% 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 Rancho Cucamonga to Lake Forest 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	47	63	72	74	62	54	53	53	53	53	54	55	53	53	48	48	47
Tue	46	65	74	75	69	55	51	50	50	50	54	54	51	54	49	48	46
Wed	47	64	70	76	68	56	51	51	52	51	51	52	51	50	48	48	46
Thu	46	64	72	72	62	56	53	52	54	54	54	55	54	53	48	47	46
Fri	46	56	60	60	59	53	54	55	54	55	55	56	55	56	52	48	46
Sat	47	48	49	49	49	51	56	58	61	60	58	57	53	55	51	48	46
Sun	46	47	47	48	49	50	53	55	61	58	57	55	50	51	50	52	46

About this drive

On weekdays the 49-mile drive from Rancho Cucamonga to Lake Forest (via I-15 South and SR-241 South and SR-91 West) usually takes as little as 46 minutes and up to 80 minutes, when leaving around 7:30 am on Tuesdays. The fastest times to leave are before 5:30 am or after 6:30 pm. Midday (11 am to 2 pm) it takes about 52 minutes. On weekends it is slowest around 1:30 pm on Sundays (63 minutes).

About 42 miles of it is freeway, where times follow typical and live traffic from our sensors, and about 6 miles surface streets (8 to 15 minutes on weekdays), estimated from how jammed the freeways around them are at that time. Drive times are measured from central Rancho Cucamonga to central Lake Forest 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 Rancho Cucamonga to Lake Forest?

On weekdays, leave before 5:30 am or after 6:30 pm. The drive usually takes about 46 minutes then, versus up to 80 minutes at the worst times.

How long does it take to drive from Rancho Cucamonga to Lake Forest?

The 49-mile drive usually takes 46 to 80 minutes on weekdays, depending on when you leave, and about 52 minutes midday.

When is traffic worst from Rancho Cucamonga to Lake Forest?

Leaving around 7:30 am on Tuesdays is usually slowest, about 80 minutes.

Freeways on this drive

SR-241 South in Orange County (16 miles) · I-15 South in Inland Empire (11 miles) · SR-91 West in Orange County (10 miles) · I-15 South in Orange County (6 miles)

Inland Empire traffic right now · Inland Empire traffic tomorrow · Orange County traffic right now · Orange County traffic tomorrow

More drives

Lake Forest to Rancho Cucamonga (return trip) · Rancho Cucamonga to Los Angeles · Rancho Cucamonga to Santa Monica · Rancho Cucamonga to Pasadena · Rancho Cucamonga to Long Beach · Rancho Cucamonga to West Covina · Rancho Cucamonga to Burbank · Rancho Cucamonga to Glendale · Rancho Cucamonga to Santa Clarita · Rancho Cucamonga to Van Nuys · Rancho Cucamonga to Torrance · Rancho Cucamonga to LAX

Open the live traffic map →

Leave	5am	6am	7am	8am	9am	10am	11am	12pm	1pm	2pm	3pm	4pm	5pm	6pm	7pm	8pm	9pm
Mon	47	63	72	74	62	54	53	53	53	53	54	55	53	53	48	48	47
Tue	46	65	74	75	69	55	51	50	50	50	54	54	51	54	49	48	46
Wed	47	64	70	76	68	56	51	51	52	51	51	52	51	50	48	48	46
Thu	46	64	72	72	62	56	53	52	54	54	54	55	54	53	48	47	46
Fri	46	56	60	60	59	53	54	55	54	55	55	56	55	56	52	48	46
Sat	47	48	49	49	49	51	56	58	61	60	58	57	53	55	51	48	46
Sun	46	47	47	48	49	50	53	55	61	58	57	55	50	51	50	52	46

Leave	5am	6am	7am	8am	9am	10am	11am	12pm	1pm	2pm	3pm	4pm	5pm	6pm	7pm	8pm	9pm
Mon	47	63	72	74	62	54	53	53	53	53	54	55	53	53	48	48	47
Tue	46	65	74	75	69	55	51	50	50	50	54	54	51	54	49	48	46
Wed	47	64	70	76	68	56	51	51	52	51	51	52	51	50	48	48	46
Thu	46	64	72	72	62	56	53	52	54	54	54	55	54	53	48	47	46
Fri	46	56	60	60	59	53	54	55	54	55	55	56	55	56	52	48	46
Sat	47	48	49	49	49	51	56	58	61	60	58	57	53	55	51	48	46
Sun	46	47	47	48	49	50	53	55	61	58	57	55	50	51	50	52	46

Leave	5am	6am	7am	8am	9am	10am	11am	12pm	1pm	2pm	3pm	4pm	5pm	6pm	7pm	8pm	9pm
Mon	47	63	72	74	62	54	53	53	53	53	54	55	53	53	48	48	47
Tue	46	65	74	75	69	55	51	50	50	50	54	54	51	54	49	48	46
Wed	47	64	70	76	68	56	51	51	52	51	51	52	51	50	48	48	46
Thu	46	64	72	72	62	56	53	52	54	54	54	55	54	53	48	47	46
Fri	46	56	60	60	59	53	54	55	54	55	55	56	55	56	52	48	46
Sat	47	48	49	49	49	51	56	58	61	60	58	57	53	55	51	48	46
Sun	46	47	47	48	49	50	53	55	61	58	57	55	50	51	50	52	46