What is survival? Here’s an easy baseline: You’ll know it when you’re eating the weakest sled dog. BACKPACKER contributors have seen it all, from horrific wounds to animal attacks to life-or-death mishaps on the trail. The thin line between daring and death? We've walked it. In this A to Z guide, you'll learn all the tips, tricks, and skills you'll need to make it out alive no matter what nature throws at you.