Not sure what you are looking for in a mountainous hunt:
We were positioned just inches away from the edge of the cliff to the left, inside that cluster of trees.
The shot was across the canyon, 120 yards initially according to my rangefinder; ~125 yards when I touched the trigger.
The larger open spot is where the bushbuck was.
The bushbuck ran down through the lane and right collapsing inside the tree line between that short white line (tree) and the longer white line (taller tree).
Picture of my bushbuck, L to R, myself Lloyd my tracker, and the farm rep. (I have unfortunately forgotten his name)
I missed the bushbuck, by roughly a foot over its back, at over 600 yards, over compensated bullet drop at that steep angle and distance. We were setup about 200 yards further down the ridge from this location, shot down across the valley.
My second impala: late afternoon, ~359 yards shot across a deep, steep, narrow draw.
So yes there is some mountain hunting available. Not like hunting in the Rocky Mountains, much similar to hunting in the Appalachian Mountains.