ascent (any route)
5h 36m 38s
Christian Stangl claims an ascent time of 5h36m38s -- that is 2m faster than Brunod's 2001 time -- set on Oct. 12, 2004, as part of the Seven Summits Speed Project. Stangl ascended via the Umbwe route, which is shorter and steeper than the Marangu. His round-trip time is reported as 8h49m3s, but it is not clear which route was used for the descent.