Police investigate serious-injury weekend collision on Stoney Trail

Our Traffic Section continues to investigate after four people were transported to hospital following a single-vehicle collision in the city’s northwest on the weekend.

At approximately 11 a.m., on Saturday, March 8, 2025, a single-vehicle serious-injury collision occurred in the westbound lanes of Stoney Trail, west of the intersection with Country Hills Boulevard N.W.

At that time, a 2014 BMW M5, driven by a man in his 20s with three adult passengers, all who are men in their 20s, was travelling westbound on Stoney Trail, and was believed to be travelling at a high rate of speed on the left shoulder of the road when the driver lost control of the vehicle. It is believed the vehicle spun and crossed over all three westbound lanes of Stoney Trail, entered the ditch on the right side of the road before rolling several times up a grass embankment and coming to a rest.

All four occupants of the vehicle were ejected from the vehicle. The driver sustained serious injuries while the front passenger sustained critical injuries. The two rear passengers both sustained minor injuries.

Excessive speed is believed to be a factor in the collision.

Anyone with information about this incident or with dashcam footage is asked to contact the Calgary Police Service non-emergency number at 403-266-1234. Tips can also be submitted anonymously to Crime Stoppers through either of the following methods:

TALK: 1-800-222-8477
TYPE: www.calgarycrimestoppers.org
TEXT: P3 Tips

CA #25097188/4169