Very little daylight filters through the canopy of the old-growth forest that surrounds you in every direction. You can make out the shape of a large, gray, wolf-like canid as it moves silently and seemingly effortlessly across the rough terrain, in and out between the trees. To the south, a wide, violent rapid completely blocks your path. You struggle to maintain your balance as you move across the slippery, wet ground. You hear how something crashes through the foliage in the distance. There is no cell phone coverage at all.