It is located behind the Inland Kaikōura Mountain range in the South Island's Marlborough District.
It is New Zealand's largest farm, at over 1,800 square kilometres (440,000 acres)[1] and supports the country's biggest herd of cattle.
The land was brought back into production by a major investment in rabbit control followed by revegetation of the barren ground.
Its Angus and Angus/Hereford-cross cattle range free on the high country in summer months and graze in the warmer valleys during winter.
They are cared for by a team of stockmen camping with their dogs and horses in remote huts.
Possums and ferrets can transmit bovine tuberculosis[4] There are restrictions in place to protect the working farm.
The primary route through Molesworth is the Acheron road, from Hanmer Springs to Seddon.
Leaving the Acheron River, the road goes over Wards Pass, a climb of about 160 m, which brings the route into the upper reaches of the Awatere valley.
The historic homestead and the modern farm yards are located to the north of the Reserve.