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CAJON PASS, San Bernardino County, Calif., Oct. 20, 2026 — Four vehicles collided Monday morning, October 19, on northbound Interstate 15 near the Cajon Scales, blocking all lanes of traffic, according to the California Highway Patrol.
The crash was first reported as a collision involving unknown injuries, with all lanes blocked and two tow trucks requested. Two travel lanes reopened within roughly a half hour as crews worked to clear the scene, according to the report.
The CHP later reclassified the crash as one involving minor injuries. The agency's log lists four vehicles involved, including a gray Honda Accord.
Tow trucks responded to the scene, with one company's estimated arrival time logged at just after noon.
The incident remains under review. We hope everyone who was hurt makes a speedy recovery.
More Crash News from San Bernardino County
This multi-vehicle crash happened on Interstate 15 in Cajon Pass, CA. For other recent crashes near Cajon Pass, CA, visit our San Bernardino County accident news page.
Frequently Asked Questions
Does fog or low visibility play a role in pile-ups like this?
Reduced visibility can make it harder for drivers to see slowing or stopped traffic ahead, which is a common factor in chain-reaction crashes involving several vehicles, though it has not been confirmed as a cause here.
Why does following distance matter so much in highway traffic?
Leaving more space between vehicles gives drivers more time to react if traffic ahead slows suddenly, which can prevent one crash from triggering others behind it.
Are secondary crashes common after an initial wreck?
Yes. Traffic backing up behind a crash scene creates its own hazard, and vehicles approaching the queue too fast can cause additional collisions before the original scene is cleared.
What makes multi-vehicle crashes difficult to investigate?
With several vehicles and drivers involved, investigators often need more time to determine the sequence of impacts and how the crash began, which can delay a full account of what happened.
What to Do After a Multi-Vehicle Crash in Cajon Pass, CA
If you're involved in a multi-vehicle crash, try to move to a safe area away from traffic if your vehicle is drivable, and turn on hazard lights to warn others. Check yourself and passengers for injuries, and call 911 even if injuries seem minor, since some symptoms take hours to appear. Exchange information with other drivers and wait for CHP officers to arrive and document the scene. Getting a medical evaluation afterward, even without obvious injury, is a good idea given how common delayed symptoms like whiplash or concussion can be. Keep a copy of the CHP incident report for your records once it's available.
