August 19, 2026 4:04 AM

Semi Tractor Trailer Bursts into Flames in the Cajon Pass along Northbound I-15 Friday Afternoon

CAJON PASS, CA. (Pain In The Pass) >> A semi tractor trailer fire in the Cajon Pass Friday afternoon temporarily closes the lanes of the northbound Interstate 15. (Photo above is credit by Shawn Fox.)

California Highway Patrol reports a semi truck was on fire on the side of the 15 freeway at around 2:49pm on December 8, 2023, about 2 miles south of Cleghorn Road exit.

Officials say the flames had spread to the vegetation on the hillside and was quickly contained.

Everybody escaped the semi before it became fully engulfed. No injuries were reported at the scene. 

It looked like the semi was hauling paper or carboard product which was not described in the CHP Traffic Log.

(Photo above is credit by Jessica Gomez.)

All northbound lanes were closed about 30 minutes. Traffic was jammed at the bottom of the Cajon Pass this afternoon. CHP say’s the slow lane will be blocked for a unknown time to reopening.

The official cause of the semi fire is unknown at this time but there was reports of diesel and oil spilling from under the cab. This incident will be under investigation by the California Highway Patrol Inland Office.

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Cajon Pass
4:04 am, Aug 19, 2026
temperature icon 72°F
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Humidity: 23 %
Pressure: 1013 mb
Wind: 1 mph
Wind Gust: 3 mph
Clouds: 64%
Visibility: 10 km
Sunrise: 6:13 am
Sunset: 7:32 pm
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