A Guide to Weathering a Storm

Winter has arrived in Collinsville, Colorado, and Tessa Windsor is as prepared as any hiking guide can be.

She's led dozens of groups through these mountains. She knows the trails, the terrain, and the weather. What she doesn't count on is a freak storm rolling in fast, trapping her group of five teenagers and their teacher deep in the backcountry, miles from help.

With her satellite phone destroyed, her group sheltering in a cave, and one student down with a serious injury, Tessa has to dra...