The Umbwe Route is one of the most challenging routes on Kilimanjaro, despite being one of the shortest routes. It involves steep climbs from day one and you need a reasonable level of fitness to be able to handle this path.
This route does not allow sufficient time for acclimatization as you will be trekking at altitude for the majority of your journey. Therefore, it is best to only attempt this route if you are an experienced climber.
On the opposite end, the Northern Circuit also has a reputation for being difficult, due to its length. However, it offers more time to acclimatize, so most climbers should find it easier to reach the summit when following the Northern Circuit.
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