Early morning on Lake Rotoiti, Nelson Lakes National Park. © Janette Asche

Nelson Lakes National Park: New Zealand’s Lakes District

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Nelson Lakes National Park lies at the head of the Southern Alps and features majestic mountain ranges and the breathtaking lakes of Rotoroa and Rotoiti at its heart.

The steep mountains that surround ‘Little lake’ (Rotoiti) and ‘long lake’ (Rotoroa) reward walkers with spectacular views.

Legend tells the story of Maori chief and explorer Rakaihautu who came to Aotearoa and travelled with his people to the great mountains. With his ko (digging stick), Rakaihautu dug enormous holes that filled with water, creating the lakes which remain today. He also filled them with kai (food) for those who followed. The food – eel, freshwater mussels and waterfowl – was important for Maori travelling the pounamu (greenstone) trails to and from the West Coast.

Nelson Lakes National Park lewis pass

Lewis Pass in winter. © True New Zealand Adventures  Creative Commons

From their arrival in the 1840s, Europeans rapidly occupied open land close to Rotoiti for grazing sheep. By the turn of the century people were holidaying on the shores of the lake and a hotel was built at Rotoroa.

Soon cottages were being built at Rotoiti and people began to explore the mountains. The scenic values of the mountains and lakes were recognised by the creation of a national park in 1956.

Nelson Lakes National Park rotoroa

Lake Rotoroa in Nelson Lakes National Park. © Russell Street  Creative Commons

This alpine region is at the northern limit of the Ka Tiritiri o Te Moana Southern Alps, where ancient glaciers have shaped the dramatic landscape, leaving in their wake loose scree slopes, tarns and hanging, U-shaped valleys.

The park contains a series of mountain ranges up to 2340m high, five extensive valley systems and two major lakes.

The Alpine Fault, which runs the length of the South Island, cuts through the northern boundary of the park, swinging east-northeast across the head of Lake Rotoroa, across Lake Rotoiti, then down the Wairau Valley.

Beech forests clothe the mountain slopes up to the 1400-m treeline, where they give way to snow tussocks and alpine herbs. This is the home of the kea (mountain parrot). The beech forests here are rich in honeydew, food for kakariki (parakeet), kaka (forest parrot), tui and korimako (bellbird).

Nelson Lakes National Park kakariki

Kakariki, the red-crowned parakeet (Cyanoramphus novaezelandiae). © Bernard Spragg

Sprinkled throughout the forest are the occasional totara and a range of shrubs, many of which display an unusual, wiry form that is thought to have evolved as a defence against browsing moa.

The park is well-known in conservation circles as the site of the Rotoiti Nature Recovery Project, which covers around 5000ha of predominantly red, silver and mountain beech forest. The project aims to restore this area of forest through an extensive predator-trapping programme.

Take one of the many walks through the project and you’ll see and hear the results of this work: a forest alive with the sights and sounds of birds. 

Bellbirds chime a constant chorus, fantails can be seen flitting from tree to tree and, increasingly, the screech of the kaka can be heard ringing out. Great spotted kiwi have been reintroduced and are breeding here successfully.

Honeydew beech forests can support large numbers of native birds: the honeydew scale insect provides an energy source for nectar-feeding birds, and the sporadic and intense beech seed production (‘masting’) provides food for large numbers of seed-eating birds.

Unfortunately, this unique ecosystem has been altered dramatically by introduced deer, possums, mice, stoats and wasps. The goal is to reduce the numbers of these pests so that the ecological processes of this honeydew beech forest can recover.

Hitting the trail

Aside from the wildlife and spectacular landscape, walking and hiking are other primary reasons for coming to the park, and there is a wide range of tracks here, from short day walks to three- and five-day hikes.

At both Rotoiti and Rotoroa, there are walks from between 30 minutes and five hours. The Lake Rotoiti Circuit takes seven to ten hours and there are huts on the track so you can comfortably make it a two-day walk.

Nelson Lakes National Park St James

The start of the St James walkway. © Jocelyn Kinghorn Creative Commons

For more serious hikers, the TraversSabine circuit, which takes about five days to complete, traverses river valleys and an alpine pass, and the Lewis PassWaiau PassBlue Lake Route is a four- to five-day walk only suitable for experienced trampers.

During the warmer months, water-skiing is permitted on Lake Rotoiti but not Lake Rotoroa. Both lakes are good for fishers wanting to catch the legendary brown trout of the area. There are also loads of great mountain biking trails, and from the nearby township of St Arnaud you can access the Rainbow Skifield during the winter season.

A note of caution

The Nelson Lakes National Park contains a large amount of avalanche terrain. There are numerous avalanche paths, which may bring avalanche debris to the valley floor and a number of relatively easily accessible areas contain challenging avalanche terrain while seasonal snow is present.

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