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CAJON PASS, San Bernardino County, Calif., Oct. 16, 2026 — A three-vehicle crash shut down multiple southbound lanes of Interstate 15 south of Cleghorn Road on Thursday afternoon, October 15, the California Highway Patrol said. At least one person was reported injured.
The crash involved a semi truck, a sedan and an SUV. Early radio traffic indicated the semi had been traveling at high speed in the fast lane before the collision, though that detail has not been confirmed as a cause.
The impact left one vehicle facing sideways in the roadway and scattered debris across the lanes. Officers initially blocked the number 1 and 2 lanes, then closed lanes 1 through 3 as the scene grew, with only the number 4 lane left open to traffic at times.
A person or people were reported trapped inside one of the vehicles, per early CHP updates, though their condition has not been released. A heavy-duty tow truck was called to clear the scene after responders said one truck could not reach the crash in time; the CHP said a tractor involved was carrying roughly 35,000 pounds of cargo that also needed removal. The California Highway Patrol's Freeway Service Patrol later closed out its response to the scene.
No further details on injuries or possible citations have been released. The crash remains under investigation by the California Highway Patrol.
Our thoughts are with those who were injured, and we wish them a full recovery.
More on Crashes in Cajon Pass, CA
This crash happened at Interstate 15 and Cleghorn Road in Cajon Pass, CA. We cover crashes across San Bernardino County as they're reported, and you can browse the latest in our San Bernardino County accident reports.
Frequently Asked Questions
What typically causes a pile-up involving several vehicles?
Multi-vehicle crashes usually start with one vehicle losing control, braking hard, or colliding with another, and following traffic that cannot stop in time adds more vehicles to the collision.
Why do these chain-reaction wrecks happen so fast?
Drivers following too closely, high speeds, and heavy vehicles with long stopping distances all reduce the time available to react once a crash begins ahead of them.
What should I do if I come up on a crash scene on the highway?
Slow down well before the blocked lanes, watch for debris and stopped traffic, and follow any signals from responders directing you into an open lane.
If I'm stuck in traffic near an active crash, what should I do?
Stay in your vehicle unless told otherwise, turn on hazard lights, and keep a lookout for emergency vehicles trying to reach the scene.
What to Do After a Multi-Vehicle Crash in Cajon Pass, CA
If you're involved in or witness a multi-vehicle collision on a highway like I-15 through Cajon Pass, move to a safe area if your vehicle is drivable and call 911 to report injuries or blocked lanes. Even if you feel fine, a medical check is worth getting, since some injuries from a sudden stop or impact don't show symptoms right away. Get contact information for other drivers and any witnesses, and ask responding officers how to obtain a copy of the official collision report once it's filed. Keep track of any medical visits or vehicle damage for your own records.
