Lachlan Valley Way is a New South Wales country road running from Booligal to north of Yass.

Lachlan Valley Way commences at the intersection with Cobb Highway in Booligal and heads in a north-easterly direction for about 76 km (47 mi) to Hillston.

It then turns south through Boorowa, to end after another 119 km (74 mi) at the Hume Highway north-west of Yass.

[6] Trunk Road 61 was re-aligned to run between Orange and Condobolin via Parkes on 6 April 1938; its former alignment between Condobolin and Forbes (and continuing east via Eugowra and Cudal to Orange) was replaced by Main Road 377.

Under this act, Lachlan Valley Way today retains its declaration as part of Main Road 377, and as Main Roads 56 and 501, from Booligal to Hillston, then from Wallanthery to Lake Cargelligo, then from Condoblin via Forbes, Cowra and Boorowa to Bowning.