Trenque Lauquen is a ceety in the wast o the province o Buenos Aires, Argentinae, 444 km (276 mi) from Buenos Aires Ceety an 80 km (50 mi) frae the border wi the province o La Pampa, on the intersection o Naitional Routes 5 an 33. Trenque Lauquen is the lairgest ceety o the destrict (partido) o the same name, an haes a population o aboot 40,000 inhabitants as per the 2001 census [INDEC].