Nathan is a 2.19 marathoner, former member of the United States Army World Class Athlete program and two-time world armed forces cross-country team member. He brings over 28 years of athletic expertise to the courses you see below. Use leverage, train smarter and get better results in 2020. Click on "View Course" next to each course below to learn more. Invest in your personal development, bypass the mistakes other athletes are making and get a new personal best now.