Despite its reputation as the toughest trek, the Umbwe Route is still a non-technical climb. Taxing, but not technical. All you need are an iron will and calves of steel; this is truly a trek to test your mettle.
The difficulty is that it’s so damn relentlessly uphill. Indeed, looking back on the first couple of days we can think of very few places where you actually descend, the longest being the five minutes or so at the end of the second stage when you walk down to the Barranco Campsite.