"Kesho nitapanda mlimani"

Translation: Tomorrow I will climb the mountain

[AndyCole9]

Correct answer : 'Tomorrow I will climb the mountain'.
'at' is an unwanted interloper.

[machieng]

I think both sentences are erroneous. In Swahili you'd say 'nitapanda mlima'. 'Mlimani' implies you're already on the mountain