Well, I can do a whole MuleDeer 6 miles. Gotta stop a lot though if it's during daylight hours, 'cause of the heat buildup. And I'm tapped out for like 3 days afterward. But if you're hike-out is crazy steep and there's no trail line to help. It's gonna be a while before you get back to the truck. You just might have to heat up a meal at the truck, eat, and maybe even nap a few before you can safely drive your butt back home though, due to exhaustion/tiredness levels by then.