The North Face Endurance Challenge Series makes its return to Utah. Trail running races include: 50M, 50k, Marathon, and Marathon Relay on Saturday and a Half Marathon, 10k and 5k on Sunday.  The course cruises through the trails of Park City Mountain Resort, offering a mix of terrain and elevation! Use the discountNorth Face Challenge code VISITPC20 to save 20% on registration. The dates are September 24-25.