Libertarian presidential candidate Gary Johnson is no pushover: He's scaled the world's highest peaks and run some of its toughest races.

Now, Johnson is taking on perhaps his toughest challenge of all: promoting health and fitness among the American people.

On Saturday, the former governor of New Mexico and his fiancee, Kate Prusack, will lead a bike ride from Taos, New Mexico, to Santa Fe, New Mexico, a journey of over 70 miles, culminating in a #FitToBePrez rally extolling the benefits of an active lifestyle.

“Being fit and healthy is a great way for Americans to take control of their own lives, and that’s what I am all about,” Johnson said in a press release. "The benefits not just to each individual, but to society as a whole, of health and fitness are incalculable."

Johnson has also put a premium on a healthy diet: He stays away from alcohol and sugar, and he keeps gluten-free.

"As the nation continues to wrestle with health care policy and costs, too little attention is paid to being healthier in the first place," he added. "One of the reasons I am such an advocate for bringing health care back into a competitive, free-market environment is that doing so will place greater emphasis on preventative measures and healthy lifestyles."