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I think the question of boots vs. running shoes is similar to the question of trekking poles vs. no trekking poles. There are rational arguments to be made on each side, and there are specific cases where one is clearly better than the other, but I suspect that for 90% of people it's a choice that's made based on factors that are objectively unjustifiable, e.g., skillful salesmanship for the more expensive option, or a perception that one looks more "pro" than the other.
The claim that you need boots for rocky terrain is pure bunk. Many of us here hike on rocky terrain using running shoes, with no problems.
IMO some of the valid arguments are as follows:
In favor of running shoes: -They're much lighter than boots, and weight on your feet causes much more exertion than weight anywhere else on your body. The figure I've heard (dunno if it's scientifically supported) is that a pound on your feet is equivalent to 3 lb on your back. If this 3:1 ratio is correct, then replacing a 48-oz pair of boots with a 25-oz pair of running shoes is equivalent to dropping 4 lb of pack weight. What's a huge amount of weight! -A ton of people get out on the trail in boots and find that they haven't quite broken them in well enough. This is less likely to happen with running shoes, because you can wear running shoes while running, shopping, at work, etc. -Boots have more surface area in contact with your skin. That's more opportunities for blisters.
In favor of boots: -Running shoes have a relatively short period of time during which they're sufficiently broken in to be comfortable, but have not yet seriously deteriorated. This window is probably only about 100 mi. The window for boots is much, much longer. On a long through-hike, this is a significant win for boots. -Let's consider a person who's not doing an UL style in general. He's carrying a 50-lb pack, and he wants to make a long leap from one rock to another. With boots, he probably does significantly reduce the chances of getting a twisted ankle. Of course the solution to this is not to carry a 50-lb pack. -For a certain type of hike, where you're basically tromping through muck and ankle-deep water all day, I can definitely see the advantages of a waterproof boot. On the other hand, if you're also passing through a significant amount of deeper water every day, then you're just going to have wet feet no matter what, and the boots lose their advantage.
-Ben
Edited by bcrowell on 07/31/2010 09:05:30 MDT.
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