Tantangara Reservoir sits in the high country of the Snowy Mountains region of New South Wales, impounding the headwaters of the Murrumbidgee River behind a 45-metre concrete gravity dam completed in 1960. Perched at an elevation of approximately 1,230 metres above sea level, the reservoir covers a surface area of over 2,100 hectares and holds up to 254,099 megalitres at full capacity. As part of the Snowy Mountains Scheme — one of Australia's most ambitious engineering projects — much of the reservoir's impounded water is diverted to Lake Eucumbene rather than flowing downstream. The result is a high-altitude, cold-water fishery of exceptional quality, set within the dramatic alpine and sub-alpine landscape of Kosciuszko National Park. The NSW Department of Primary Industries and the NSW National Parks and Wildlife Service have actively worked to promote angler access to this under-utilised but outstanding trout fishery.