Lemosho
Long access drive, remote, less frequented, beautiful forests, scenic traverse to Barafu, camping. Excellent for acclimatisation.
Days = 8(-1)   Length = 56km

Machame
Second most popular route. Beautiful forest, very good for acclimatisation, scenic traverse to Barafu. 
Days = 7(-1)   Length = 49km

Marangu
Very popular. Gentle gradients and long sections up to 4700m. Beautiful forests and moorlands, comfortable but basic huts. The 6 day variant provides good time for acclimatisation.
Days = 6(-1)   Length = 64km

Rongai
Long access drive, remote, less frequented, some fine, wild, high-altitude mountain scenery, camping. Good for acclimatisation
Days = 6   Length = 65km

Umbwe
Shortest and steepest route, tough. Beautiful forest, spectacular ridge, good for acclimatisation, scenic traverse to Barafu, camping.
Days = 6   Length = 37km