Three years ago, Danae and Olen Netteburg set out with their four kids on the Appalachian Trail. Three years (and one more baby) later, they’re about to complete the Triple Crown. All of them.

A lot of what thru-hikers eat on the trail is far from good for you. But some nutrition-minded backpackers are trying to buck the trend.

Most of this year’s PCT class is skipping the snowbound Sierra. A small group of adventurers is pushing straight through.