Best Time to Drive from San Francisco to Alum Rock

Right now (6:03 pm PDT): about 67 minutes via US-101 South, usually 56 at this time.

Typical drive time by departure time

Minutes from San Francisco to Alum Rock 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	46	48	54	63	61	54	53	54	54	57	66	69	70	56	51	49	47
Tue	46	48	53	69	69	58	54	52	53	57	72	84	84	66	54	49	47
Wed	46	47	53	67	64	56	52	52	53	58	74	87	86	65	54	49	47
Thu	46	48	53	66	64	56	52	51	52	59	76	86	87	66	55	50	47
Fri	46	47	51	53	53	52	52	52	53	58	68	71	65	56	52	49	47
Sat	47	47	47	47	48	49	50	51	51	51	52	53	53	54	50	50	47
Sun	47	46	46	47	47	49	50	51	50	50	50	50	52	51	50	50	47

About this drive

On weekdays the 52-mile drive from San Francisco to Alum Rock (via US-101 South) usually takes as little as 46 minutes and up to 90 minutes, when leaving around 4:30 pm on Wednesdays. The fastest times to leave are before 7 am or after 8 pm. Midday (11 am to 2 pm) it takes about 53 minutes. On weekends it is slowest around 6 pm on Saturdays (54 minutes).

About 50 miles of it is freeway, where times follow typical and live traffic from our sensors, and about 1.6 miles surface streets (2 to 5 minutes on weekdays), estimated from how jammed the freeways around them are at that time. Drive times are measured from downtown San Francisco to central Alum Rock 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 San Francisco to Alum Rock?

On weekdays, leave before 7 am or after 8 pm. The drive usually takes about 46 minutes then, versus up to 90 minutes at the worst times.

How long does it take to drive from San Francisco to Alum Rock?

The 52-mile drive usually takes 46 to 90 minutes on weekdays, depending on when you leave, and about 53 minutes midday.

When is traffic worst from San Francisco to Alum Rock?

Leaving around 4:30 pm on Wednesdays is usually slowest, about 90 minutes.

Freeways on this drive

US-101 South in Bay Area (50 miles)

Bay Area traffic right now · Bay Area traffic tomorrow

More drives

Alum Rock to San Francisco (return trip) · San Francisco to San Jose · San Francisco to Palo Alto · San Francisco to Berkeley · San Francisco to Fremont · San Francisco to Walnut Creek · San Francisco to San Mateo · San Francisco to Hayward · San Francisco to Mountain View · San Francisco to Pleasanton · San Francisco to Santa Clara · San Francisco to Richmond

Open the live traffic map →

Leave	5am	6am	7am	8am	9am	10am	11am	12pm	1pm	2pm	3pm	4pm	5pm	6pm	7pm	8pm	9pm
Mon	46	48	54	63	61	54	53	54	54	57	66	69	70	56	51	49	47
Tue	46	48	53	69	69	58	54	52	53	57	72	84	84	66	54	49	47
Wed	46	47	53	67	64	56	52	52	53	58	74	87	86	65	54	49	47
Thu	46	48	53	66	64	56	52	51	52	59	76	86	87	66	55	50	47
Fri	46	47	51	53	53	52	52	52	53	58	68	71	65	56	52	49	47
Sat	47	47	47	47	48	49	50	51	51	51	52	53	53	54	50	50	47
Sun	47	46	46	47	47	49	50	51	50	50	50	50	52	51	50	50	47

Leave	5am	6am	7am	8am	9am	10am	11am	12pm	1pm	2pm	3pm	4pm	5pm	6pm	7pm	8pm	9pm
Mon	46	48	54	63	61	54	53	54	54	57	66	69	70	56	51	49	47
Tue	46	48	53	69	69	58	54	52	53	57	72	84	84	66	54	49	47
Wed	46	47	53	67	64	56	52	52	53	58	74	87	86	65	54	49	47
Thu	46	48	53	66	64	56	52	51	52	59	76	86	87	66	55	50	47
Fri	46	47	51	53	53	52	52	52	53	58	68	71	65	56	52	49	47
Sat	47	47	47	47	48	49	50	51	51	51	52	53	53	54	50	50	47
Sun	47	46	46	47	47	49	50	51	50	50	50	50	52	51	50	50	47

Leave	5am	6am	7am	8am	9am	10am	11am	12pm	1pm	2pm	3pm	4pm	5pm	6pm	7pm	8pm	9pm
Mon	46	48	54	63	61	54	53	54	54	57	66	69	70	56	51	49	47
Tue	46	48	53	69	69	58	54	52	53	57	72	84	84	66	54	49	47
Wed	46	47	53	67	64	56	52	52	53	58	74	87	86	65	54	49	47
Thu	46	48	53	66	64	56	52	51	52	59	76	86	87	66	55	50	47
Fri	46	47	51	53	53	52	52	52	53	58	68	71	65	56	52	49	47
Sat	47	47	47	47	48	49	50	51	51	51	52	53	53	54	50	50	47
Sun	47	46	46	47	47	49	50	51	50	50	50	50	52	51	50	50	47