The original core of Trens is situated on an elevated position on the eastern side of the "Trens Summit", while the village has evolved downward up to the state road, beyond this there is the Brenner railway, the Eisack river and the motorway A22.
Trensi algne tuumik paikneb kõrgel positsioonil "Trensi harja" idaküljel, samas küla on kujunenud allapoole riigimaantee juurde, kaugemal on Brenneri raudtee, Eisacki jõgi ja kiirtee A22.