The collision occurred around 1:52 a.m. on January 18 on northbound Highway 101, just south of the Peninsula Avenue off-ramp. This article explains what is known and how to request an official crash report.
SAN MATEO, CA - January 19, 2026
Major injuries were reported following a multi-vehicle collision on northbound Highway 101 in San Mateo. The crash occurred at approximately 1:52 a.m. on January 18, just south of the Peninsula Avenue off-ramp. The California Highway Patrol responded to the scene, and details about the number of vehicles involved or the cause of the crash have not been specified in reports.
Key Facts
- Crash date & time: 1:52 a.m., January 18
- Location: Highway 101 just south of the Peninsula Avenue off-ramp
- Type of crash: Multi-vehicle
- Injuries / fatalities: Major injuries reported; fatalities not specified
- Responding agencies: California Highway Patrol
- Source(s): San Mateo, CA – Major Injuries Reported in Multi-Vehicle Collision on Highway 101
Crash Overview
The collision occurred in the early hours of January 18, at approximately 1:52 a.m., on northbound Highway 101, just south of the Peninsula Avenue off-ramp in San Mateo. The California Highway Patrol was alerted to the scene, where major injuries were reported. The exact sequence of events leading to the crash has not been detailed in the available reports.
Emergency responders from the California Highway Patrol were present at the scene to manage the situation and attend to those injured. The number of vehicles involved in the collision has not been specified, nor have the details regarding the cause of the crash been released.