WINNIPEG, May 4 (Reuters) - Canadian Mounties always get their man, and the legend will hold when Constable Sue Downs gets off her horse in a Prairie town this month to tie the knot with a fellow officer.

Downs, based in the western province of Manitoba, will be one of several Royal Canadian Mounted Police officers to don their official red serge uniforms and reenact the Great Ride West of 1874, set to start in southern Manitoba at the weekend.

Downs will exchange her uniform for an antique wedding dress and join Sergeant Steve Saunders for a quick visit to a chapel when the Great Ride West hits Carnduff, Saskatchewan in a couple of weeks. ``We'll be in period uniform and we'll tie the knot in Carnduff,'' Saunders told Reuters on Tuesday. The ride will retrace the route taken by 275 members of the Northwest Mounted Police, the predecessor to the modern force, who set out on horseback to tame Canada's wild west 125 years ago under orders from Prime Minister Sir John A.Macdonald. The ride is due to end on July 3 at Fort Macleod, Alberta, where the force built its first fort -- and arrested a bunch of whiskey traders at nearby Fort Whoop-Up.