。
She climbed up the ladder and away.
Literal
She [topic-は] ladder [object-を] climb-and-go-away.
~ていく attached to a motion verb adds a sense of moving away from the speaker's vantage point — physically, temporally, or in narrative perspective. So 昇っていく isn't just 'climbed' but 'climbed up and went off,' with the speaker watching from below. 昇る (as opposed to 登る) emphasises smooth vertical ascent, as the sun 'rises' (日が昇る) or one 'goes up' stairs; for clambering up a mountain, 登る is more typical, though both kanji are sometimes used interchangeably for ladders.