Humboldt, Saskatchewan. Rintoul Stables & Therapeutic Riding Center is a privately owned riding and boarding stable located 12 miles north west of the city of Humboldt, Saskatchewan and 60 miles east of Saskatoon, Saskatchewan. They provide a Canadian Therapeutic Riding Association (CANTRA) Certified Therapeutic Riding Program, Certified Equine Assisted Learning Program, lessons, summer horsemanship camps, trail rides, horse boarding and arena rentals.