A 29-year-old man is in hospital following a serious crash in northwest Calgary.

Police were called to the scene of a single vehicle crash at Symons Valley Road and Kincora Glen Road N.W. at about 3:30 a.m. on Monday.

They say the Pathfinder went over a curb, down an embankment, where it finally crashed into a fence.

A passerby found the unconscious driver, who was rushed to Foothills Hospital. No one else was in the vehicle.

Investigators say speed and alcohol are not factors in the crash. Investigators are trying to determine if drugs played a role