Northstar will host the Tough Mudder event series Sept. 22-23 at the Truckee resort.

Tough Mudder events are 10- to 12-mile obstacle courses designed by British Special Forces to test all around strength, stamina, mental grit, and camaraderie. With the most innovative courses, half a million participants, and more than $2.5 million raised for the Wounded Warrior Project, Tough Mudder is the premier adventure challenge series in the world.

Registration is open.

For more information about the Tough Mudder event at Northstar or to register, go online.