Sixty-one kilometres of classified trout water from the Lyell wall to the Little River junction — Glenroy, Duddawarra, Sandy Hook and the Six Foot Track, two gauges, farmed pools that hold fish through summer, and a gorge at the bottom that drops off a shelf.
This is the stretch most people mean when they say they fish the Coxs, and it is the one to start on. Below the Lyell dam wall the river runs sixty-one kilometres through farm country west of the Blue Mountains, close enough to Sydney for a day trip, with a bridge or a camping area every few kilometres and a deep permanent pool below each one. The fish are wild brown and rainbow trout, and they live in those pools and the deep bends, not in the shallow runs between them. Learn that first and the rest of the stretch makes sense.
The shape of it is simple. The top half is open paddock water with road access at named points: the McKanes Falls Road bridge near the highway, the Glenroy camping area where a tributary called the Lett joins, Duddawarra bridge, and the unfenced miles toward Sandy Hook. Below Sandy Hook the timber closes in, the Six Foot Track crosses on its way to Katoomba, and the river drops off a shelf into a gorge that ends at the Little River junction. That last gorge is the steepest water on the whole river and the hardest to reach.
The season decides the trip. This is a general trout water, which means it is closed from the June long weekend to the October one. Fish it in the weeks after the October opening while the pools are full and the fish are fresh. Come back from Christmas for the hopper afternoons along the grassed banks. In the heat of summer the riffles run thin and the fish sit deep, so fish first and last light or head for the shaded bottom end. Leave it alone through winter, when the law says so and the fish you want are in the gorge below the junction anyway.
Two gauges watch this water, one at Lithgow near the top and one at Island Hill at the bottom, and their readings sit under Conditions. Read Lithgow before you drive.