The high, open plateau of southern New South Wales around Cooma: treeless frost plains, basalt soils and a handful of small, clear rivers winding between tussocks and undercut banks. It sits in the rain shadow of the Snowy Mountains, so the streams run lower and clearer than their size suggests, warm in summer, and rise and fall on the weather rather than the snow. The bank survey on the Numeralla page puts a number on the absence of trees: less than one per cent of that river’s corridor is dense timber, and two-fifths is native grass. West of the plain the country climbs into Kosciuszko and the scheme waters, and the calendar changes with the altitude.

Two fisheries share the one region. The tableland streams, the Numeralla country east of Cooma and the small rivers threading the plain, are about approach. Fish upstream, move slowly, spend more time looking than casting, and give the first cast to the soft edge under the far bank rather than the middle of the pool. Wind is a constant companion on the open plateau; learn to use it rather than fight it, and carry a leader long enough to keep the line off slow, glassy water. From Christmas the grasshoppers come off the tussock and a hopper tight to the bank is the afternoon fly until the frosts.

The western edge is bigger water and bigger weather. The Eucumbene River is a compact, readable river of seams and pocket water with seventy years of gauge record drawn on its page. The Snowy River below the scheme is broader and more variable, rewarding anglers who cover ground with nymphs and small streamers. The scheme pondages and storages hold fish year-round and keep the region honest when summer heat or low water shuts the small streams down. The Murrumbidgee crosses the plain between the two, a snowmelt river in the middle of rain-shadow country.

Start with the Eucumbene River if you want to learn the region one lie at a time, and the Snowy River if you would rather cover water. The Numeralla River is the classic Monaro tableland stream, slow, clear and unforgiving of a heavy footfall, and worth the research it takes to fish it well; its gauge says fish it in autumn and spring, not summer. For the fish itself, the brown trout in the Monaro guide covers tackle, flies and season in detail, and the national brown trout page carries the biology behind the behaviour.

Spring brings rising water and improving insect activity, with the usual cost of cold, coloured early-season flows on the plain and snowmelt on the western edge. Summer is the terrestrial season, hoppers on the wind across the plateau and beetles under the banks, and the time when altitude and shade decide which water stays fishable: the tableland streams warm into the twenties by January and the trip moves west to the alpine water. Autumn produces deliberate, well-conditioned fish on the plain before winter pushes the fishing toward the open impoundments. The rain shadow means conditions turn faster than the calendar; check the gauge and the forecast before committing to a small stream.

NSW applies freshwater bag and size rules and separately identifies trout waters and seasonal closures, and parts of this region sit inside Kosciuszko National Park with its own access arrangements. Check the current NSW freshwater limits and the current freshwater closure notices before you fish. The plain is largely freehold grazing country. A line on the map is not access permission; use formed public access and authority-listed angler access sites, and obey gates and signs.