The Western States ® 100-Mile Endurance Run is the world’s oldest 100-mile trail race. Presented by HOKA. The Western States 100 Mile Endurance Run presented by HOKA starts in Olympic Valley and ends in Auburn, CA, a total of 100 miles. Our mission is to be a leader in the sport of ultrarunning and promote its personal and community benefits through trail stewardship, research, and providing a life-changing experience.