The River Lett is a small river which flows through the Hartley Valley between Lithgow and Mt Victoria. It is a tributary of the Cox’s River, which it meets at Glenroy on Jenolan Caves Road. It has long been stocked with trout and it does fish well for a river of its size. The best public access points are near the historic village of Hartley. Hartley reserve is located at the start of Jenolan Caves Road near the Great Western Highway. This section of river normally holds rainbow trout of 25cm to 30cm, but there is the odd brown trout of a larger size.
The river is often discoloured and this can make fishing more difficult. If the river is particularly brown try bead head flies, as they are easier for the fish to see. If it is clear then just choose your favourite pattern to suit the conditions.
Celters and softy plastics are nice to fish in this stream as the water is quite shallow. Smaller sizes are best.
As a tributary of the upper Cox’s River (above Little River) the River Lett is considered a General Trout Stream under NSW fishing regulations.