Altadena, CA – Motorcycle Crash on I-5 S/Osborne St. On-Ramp Leaves Injuries

Altadena, CA (September 17, 2025) – A serious collision involving a motorcycle and another vehicle occurred on Wednesday, September 17, along the southbound lanes of I-5 near the Osborne Street on-ramp. The California Highway Patrol reported that the crash happened during the afternoon commute, prompting an immediate response. A motorcycle and a passenger vehicle collided under unclear circumstances, leaving the motorcyclist with significant injuries.

Ambulances were dispatched, and the rider was quickly transported to a nearby hospital for emergency treatment. The other driver involved remained at the scene and cooperated with CHP officers. Both vehicles sustained noticeable damage, and debris was scattered across the roadway.

Lanes in the area were temporarily blocked as officials cleared the crash site. CHP investigators are continuing to review the sequence of events leading up to the accident.

Our thoughts are with the injured rider, and we hope for a swift recovery.

If you’ve been injured in a motorcycle accident on I-5, contact our skilled personal injury attorney at (888) 511-4558 for guidance on your legal rights.