A rock, a junction, and a deliberately hard day
Lava Tower is a volcanic plug standing on the western side of Kilimanjaro, at the point where several routes meet. TANAPA’s own route map for the park marks it, together with Arrow Glacier Camp just above and Barranco Camp below, and shows the Machame, Lemosho and Shira routes converging there before the South Circuit Route runs east.
TANAPA publishes no altitude for Lava Tower, and neither does any other authority consulted for this page. The figure quoted almost universally in operator itineraries comes from that material rather than from the park, and it is not repeated here. The same is true of Arrow Glacier and of the crater camp site.
Why itineraries go there
The reason Lava Tower appears on so many itineraries is not the rock. It is the standard acclimatisation manoeuvre on the western routes: parties climb well above the height they will sleep at, spend an hour or two there, and descend to camp lower down at Barranco. Climb high, sleep low, on the only day of the trek where the profile is deliberately shaped that way.
The honest consequence is that Lava Tower day is frequently the worst day of a Kilimanjaro trek. It is the day most people first feel altitude properly, it involves a substantial descent after a substantial climb, and the lunch stop at the top is often a cold and headachy affair. That it is unpleasant is not a sign the trek is going wrong; it is what the day is for.
Some operators bypass it. Whether a given itinerary includes it, and what that does to the acclimatisation profile, is a question worth asking before booking — the climbing Mount Kilimanjaro guide and the individual route guides cover how route choice affects the odds of reaching the summit.
What is there
A large dark tower of solidified lava standing clear of the surrounding alpine desert, with the Western Breach and the ice above it and the Barranco valley below. Some parties scramble on the lower rock; most eat lunch, take photographs and start down. There are no facilities.
The route on from Lava Tower descends into the Barranco valley, through the giant senecio, to Barranco Camp under the Barranco Wall. The alternative continuation, straight up past Arrow Glacier and through the Western Breach, is a different and more serious proposition with its own guide.
Common questions
How high is Lava Tower?
No authority publishes an altitude for it. TANAPA marks it on its route map without a figure, and the number quoted in itineraries is operator material.
Why do climbers feel ill at Lava Tower?
Because the day is designed to take you well above your sleeping altitude and back down again. Feeling the altitude there is the expected outcome of the exercise, not a sign of a problem.
Can you skip Lava Tower?
Some itineraries route around it. Whether that helps or hurts depends on what replaces it in the acclimatisation profile, which is worth asking about before booking.