Translation:We have to leave here when the sun rises.
I think 'to leave from here' suggests that you are not only leaving this place but you are leaving this place to go somewhere else determined. So it would mean more like to depart, to set off, which translates to 'yola çıkmak'.
We are leaving from here. - Buradan yola çıkıyoruz.
I'm not 100% sure though.