Best overallThe boot for a full circuit with a real pack on your back
Salomon Quest 4 GTX
Stiff enough to carry weight over a pass and still comfortable on day fourteen — you pay for that in weight and in a break-in period you cannot skip.

Lowa Renegade GTX Mid
Nubuck leather, Gore-Tex, mid-height
4.4 on Amazon (481 ratings)
The most forgiving first week of any boot we see on the trail; the trade is a softer sole that flexes more than it should under a heavy load.
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Do not buy this if: You have wide feet. Try them on, or buy a boot with a wide fitting; no amount of lacing fixes a narrow last.
Not every route needs it. These are the ones where our guides would put it on your list.
Everything else we recommend in trekking boots, including the ones we think suit a different trekker.
Best overallSalomon Quest 4 GTX
Stiff enough to carry weight over a pass and still comfortable on day fourteen — you pay for that in weight and in a break-in period you cannot skip.
Best valueMerrell Moab 3 Mid Waterproof
Covers every lodge trek below 5,000 m for a fraction of the money — the sole is softer and the upper wears out faster, which is fine if this is a one-trip boot.