Carrying a knife when you're outdoors is a no-brainer. And carrying an outdoor fixed blade knife is an indicator that sweet experience has taught you how to be an outdoor boss.
Folding knives are great-- until you get stuck in a downpour, traipse through the mud and crawl up a canyon only to find your knife opens with a gritty crunch. Outdoor fixed blade knives cut down on weight and moving parts, plus add strength to the build of the knife. They won't fold on you and there isn't a pivot to get dirty. Blade play and lockup are non-issues. When you're running your adventure hard and fast, take a fixed blade knife to cut down on weight and eliminate the chances of your knife failing when you're off the beaten path.