Are these good for general hiking say, 70+ mile hikes without snow?

Yes; absolutely. The boot has half-length shank so it flex's well for a mountaineering boot. It is stiffer than a hiking boot, but with a 50lb pack and humping 70 miles; These would give great support in handling what you put the boots through.

George,These boots would not be ideal for hiking 70 miles not in, or in, snow. The reason for this is the Glacier is a very stiff boot that doesn't flex in the toe that easily. A similar Sportiva mountaineering boot (hybrid crampon compatible , stiffer, sportiva fit) is the Trango S Evo. http://www.backcountry.com/store/LSP0021/La-Sportiva-Trango-S-EVO-GTX-Mountaineering-Boot-Mens.html This boot is still pretty stiff but the break in time will be a lot less and in comparison springs forward when walking. Here are two additional options to look at as well Asolo Powermatichttp://www.backcountry.com/store/ASO0014/Asolo-Power-Matic-200-GV-Backpacking-Boot-Mens.html This boot is very comfortable, stable, and performs well as a workhorse boot. Another boot that would be suitable is the Salmon 3D Fastpackerhttp://www.salomonsports.com/us/#/footwear/footwear/trekking/3d-fastpacker-mid-gtxIt provides support (not as much as the heavier Sportiva or Asolo) and is great if you are more of a light packer or like to cover a lot of miles (say 70) and at a brisk pace. Best of luck.Mahalo, Sumo