Best Time to Drive from San Marcos to Rialto

Right now (3:20 pm PST): about 92 minutes via I-215 North and I-15 North, usually 83 at this time.

Only 37% 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 San Marcos to Rialto 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	78	96	105	98	87	89	91	91	98	98	96	95	93	85	76	73	72
Tue	75	98	110	103	86	86	86	92	94	99	104	107	98	84	74	73	72
Wed	76	100	108	98	85	85	87	90	95	99	103	111	101	85	76	73	72
Thu	76	96	107	98	88	85	90	90	95	99	107	119	114	91	82	74	72
Fri	77	89	98	92	88	91	96	99	102	116	130	135	123	97	84	77	75
Sat	72	73	73	75	79	82	82	84	85	88	85	82	82	78	76	74	73
Sun	72	72	72	74	74	78	81	86	83	79	79	77	78	77	76	74	72

About this drive

On weekdays the 75-mile drive from San Marcos to Rialto (via I-215 North and I-15 North) usually takes as little as 72 minutes and up to 140 minutes, when leaving around 3:30 pm on Fridays. The fastest times to leave are before 5:30 am or after 7 pm. Midday (11 am to 2 pm) it takes about 95 minutes. On weekends it is slowest around 1:30 pm on Saturdays (90 minutes).

About 61 miles of it is freeway, where times follow typical and live traffic from our sensors, and about 14 miles surface streets (18 to 39 minutes on weekdays), estimated from how jammed the freeways around them are at that time. Drive times are measured from central San Marcos to central Rialto 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 Marcos to Rialto?

On weekdays, leave before 5:30 am or after 7 pm. The drive usually takes about 72 minutes then, versus up to 140 minutes at the worst times.

How long does it take to drive from San Marcos to Rialto?

The 75-mile drive usually takes 72 to 140 minutes on weekdays, depending on when you leave, and about 95 minutes midday.

When is traffic worst from San Marcos to Rialto?

Leaving around 3:30 pm on Fridays is usually slowest, about 140 minutes.

Freeways on this drive

I-215 North in Inland Empire (34 miles) · I-15 North in San Diego (19 miles) · I-15 North in Inland Empire (8 miles)

San Diego traffic right now · San Diego traffic tomorrow · Inland Empire traffic right now · Inland Empire traffic tomorrow

More drives

Rialto to San Marcos (return trip) · San Marcos to San Diego · San Marcos to Anaheim · San Marcos to Riverside · San Marcos to Santa Ana · San Marcos to Chula Vista · San Marcos to Irvine · San Marcos to San Bernardino · San Marcos to Fontana · San Marcos to Moreno Valley · San Marcos to Huntington Beach · San Marcos to Oceanside

Open the live traffic map →

Leave	5am	6am	7am	8am	9am	10am	11am	12pm	1pm	2pm	3pm	4pm	5pm	6pm	7pm	8pm	9pm
Mon	78	96	105	98	87	89	91	91	98	98	96	95	93	85	76	73	72
Tue	75	98	110	103	86	86	86	92	94	99	104	107	98	84	74	73	72
Wed	76	100	108	98	85	85	87	90	95	99	103	111	101	85	76	73	72
Thu	76	96	107	98	88	85	90	90	95	99	107	119	114	91	82	74	72
Fri	77	89	98	92	88	91	96	99	102	116	130	135	123	97	84	77	75
Sat	72	73	73	75	79	82	82	84	85	88	85	82	82	78	76	74	73
Sun	72	72	72	74	74	78	81	86	83	79	79	77	78	77	76	74	72

Leave	5am	6am	7am	8am	9am	10am	11am	12pm	1pm	2pm	3pm	4pm	5pm	6pm	7pm	8pm	9pm
Mon	78	96	105	98	87	89	91	91	98	98	96	95	93	85	76	73	72
Tue	75	98	110	103	86	86	86	92	94	99	104	107	98	84	74	73	72
Wed	76	100	108	98	85	85	87	90	95	99	103	111	101	85	76	73	72
Thu	76	96	107	98	88	85	90	90	95	99	107	119	114	91	82	74	72
Fri	77	89	98	92	88	91	96	99	102	116	130	135	123	97	84	77	75
Sat	72	73	73	75	79	82	82	84	85	88	85	82	82	78	76	74	73
Sun	72	72	72	74	74	78	81	86	83	79	79	77	78	77	76	74	72

Leave	5am	6am	7am	8am	9am	10am	11am	12pm	1pm	2pm	3pm	4pm	5pm	6pm	7pm	8pm	9pm
Mon	78	96	105	98	87	89	91	91	98	98	96	95	93	85	76	73	72
Tue	75	98	110	103	86	86	86	92	94	99	104	107	98	84	74	73	72
Wed	76	100	108	98	85	85	87	90	95	99	103	111	101	85	76	73	72
Thu	76	96	107	98	88	85	90	90	95	99	107	119	114	91	82	74	72
Fri	77	89	98	92	88	91	96	99	102	116	130	135	123	97	84	77	75
Sat	72	73	73	75	79	82	82	84	85	88	85	82	82	78	76	74	73
Sun	72	72	72	74	74	78	81	86	83	79	79	77	78	77	76	74	72