What is the relationship between speed and safety? What is the boundary and how do you know when you're hitting it? Ultrarunners have the fitness to get really far into the backcountry, but do they have the skill and experience to get back safely?

"People are drawn to these routes, because they're super aesthetic, iconic lines. But are they over their head?"

"You can download a .gpx file and just follow your watch on a trail, but on technical terrain, that doesn't work."