UPDATE: 1 killed and 1 seriously injured in single motorcycle crash on Cascade Lakes Highway

(Update: Adding new details from St.Charles Hospital, and Oregon State Police)

BEND, Ore. (KTVZ) -- St.Charles Hospital says a Bend woman is now in fair condition after the man she was riding with on a motorcycle, drove off the shoulder of the Cascade Lakes Highway and struck a tree, killing him at the scene. Oregon State Police found drugs and alcohol, and believe speed to also be a factor in the crash.

The preliminary investigation indicated a black Husqvarna motorcycle, operated by Beau Douglas Gibney (36) of Sisters, was traveling southbound on Forest Service Road 46 (also known as Century Drive and Cascade Lakes Highway) when it drove off the west shoulder roadway near milepost 24 and struck a tree stump.

Both the operator and a passenger, Joeana Erica Spackman (34) of Bend, were thrown from the motorcycle. The passenger (Spackman) was transported by air ambulance to a local hospital with serious injuries.

Speed and impairment are believed to be contributing factors in the crash.

The highway was closed for approximately four hours during the on-scene investigation.