A new 45-kilometre Great Walk will be created near the Pike River coal mine as a memorial to the 29 miners who died at the site five years ago.
The Paparoa National Park between Greymouth and Westport will also be expanded by nearly 4000 hectares to include the old coal mine, Environment Minister Nick Smith said this afternoon.
Marking the anniversary of the disaster, Dr Smith said the memorial came about because of the Pike River families' "determination that some good might come out of the terrible tragedy".
He said the Great Walk would bring new tourism and economic development opportunities to the West Coast of the South Island and ensure the final resting place of the miners remained accessible but was still properly respected.
The miners were killed by large methane explosions in the underground mine in November 2010, and their bodies have not been recovered.