An employee was preparing to go to another ranch location to work cattle. This would include getting the cow dogs from the dog pen which are located behind a mobile home adjacent to the barn. The employee was driving his utility task vehicle (UTV) through the mobile home yard to the dog pens when the UTV hit a hole in the yard while it was turning. This caused the UTV to overturn and land on the employee's left leg, resulting in a fracture to his left fibula that required surgery.