Best Time to Drive from Rialto to San Marcos

Right now (6:06 pm PDT): about 82 minutes via I-215 South and I-15 South, usually 78 at this time.

Only 54% 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 Rialto 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	77	92	92	90	87	83	81	82	85	86	90	85	85	78	73	74	73
Tue	75	94	95	93	86	82	81	82	82	86	86	89	86	80	74	73	72
Wed	74	92	93	90	88	82	82	82	82	85	89	87	88	80	75	73	72
Thu	75	95	94	92	88	82	81	82	82	86	91	91	88	81	75	74	72
Fri	72	81	84	88	87	84	84	86	89	92	94	92	91	86	81	74	72
Sat	72	72	72	73	76	80	86	87	90	87	85	82	81	80	75	74	72
Sun	72	72	72	73	73	76	79	81	82	80	79	77	76	77	76	78	72

About this drive

On weekdays the 75-mile drive from Rialto to San Marcos (via I-215 South and I-15 South) usually takes as little as 72 minutes and up to 96 minutes, when leaving around 6:30 am on Wednesdays. The fastest times to leave are before 5:30 am or after 6:30 pm. Midday (11 am to 2 pm) it takes about 84 minutes. On weekends it is slowest around 1 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 (17 to 27 minutes on weekdays), estimated from how jammed the freeways around them are at that time. Drive times are measured from central Rialto 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 Rialto to San Marcos?

On weekdays, leave before 5:30 am or after 6:30 pm. The drive usually takes about 72 minutes then, versus up to 96 minutes at the worst times.

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

The 75-mile drive usually takes 72 to 96 minutes on weekdays, depending on when you leave, and about 84 minutes midday.

When is traffic worst from Rialto to San Marcos?

Leaving around 6:30 am on Wednesdays is usually slowest, about 96 minutes.

Freeways on this drive

I-215 South in Inland Empire (34 miles) · I-15 South in San Diego (14 miles) · I-15 South in Inland Empire (10 miles) · SR-60 East in Inland Empire (3 miles)

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

More drives

San Marcos to Rialto (return trip) · Rialto to Los Angeles · Rialto to Long Beach · Rialto to Anaheim · Rialto to Riverside · Rialto to Santa Ana · Rialto to Irvine · Rialto to Moreno Valley · Rialto to Huntington Beach · Rialto to Glendale · Rialto to Santa Clarita · Rialto 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	77	92	92	90	87	83	81	82	85	86	90	85	85	78	73	74	73
Tue	75	94	95	93	86	82	81	82	82	86	86	89	86	80	74	73	72
Wed	74	92	93	90	88	82	82	82	82	85	89	87	88	80	75	73	72
Thu	75	95	94	92	88	82	81	82	82	86	91	91	88	81	75	74	72
Fri	72	81	84	88	87	84	84	86	89	92	94	92	91	86	81	74	72
Sat	72	72	72	73	76	80	86	87	90	87	85	82	81	80	75	74	72
Sun	72	72	72	73	73	76	79	81	82	80	79	77	76	77	76	78	72

Leave	5am	6am	7am	8am	9am	10am	11am	12pm	1pm	2pm	3pm	4pm	5pm	6pm	7pm	8pm	9pm
Mon	77	92	92	90	87	83	81	82	85	86	90	85	85	78	73	74	73
Tue	75	94	95	93	86	82	81	82	82	86	86	89	86	80	74	73	72
Wed	74	92	93	90	88	82	82	82	82	85	89	87	88	80	75	73	72
Thu	75	95	94	92	88	82	81	82	82	86	91	91	88	81	75	74	72
Fri	72	81	84	88	87	84	84	86	89	92	94	92	91	86	81	74	72
Sat	72	72	72	73	76	80	86	87	90	87	85	82	81	80	75	74	72
Sun	72	72	72	73	73	76	79	81	82	80	79	77	76	77	76	78	72

Leave	5am	6am	7am	8am	9am	10am	11am	12pm	1pm	2pm	3pm	4pm	5pm	6pm	7pm	8pm	9pm
Mon	77	92	92	90	87	83	81	82	85	86	90	85	85	78	73	74	73
Tue	75	94	95	93	86	82	81	82	82	86	86	89	86	80	74	73	72
Wed	74	92	93	90	88	82	82	82	82	85	89	87	88	80	75	73	72
Thu	75	95	94	92	88	82	81	82	82	86	91	91	88	81	75	74	72
Fri	72	81	84	88	87	84	84	86	89	92	94	92	91	86	81	74	72
Sat	72	72	72	73	76	80	86	87	90	87	85	82	81	80	75	74	72
Sun	72	72	72	73	73	76	79	81	82	80	79	77	76	77	76	78	72