 It then turns south through Boorowa, to end after another 119 km at the Hume Freeway north-west of Yass.For most of its length Lachlan Valley Way has no route number, the exception being the 119 km section between Cowra and the Hume Freeway, which is part of NSW state route B81.From Cowra, where Lachlan Valley Way continues west with no allocated route number, route B81 continues north a further 96 km to Molong, where it meets the Mitchell Highway.