Discovering Diamond Lake
Tucked just off Mount Aspiring Road near Wānaka, Diamond Lake, lying in front of Rocky Mountain, is more than just a scenic stop; it’s a place rich in natural beauty and local memory. Known for its reflective stillness, dramatic cliffs, and views of the Southern Alps, Diamond Lake can be even more captivating in Winter, when temperatures occasionally drop low enough for the surface to freeze. If this happens, the lake transforms into a rare icy playground.
Post Glacial Formation
Diamond Lake is a small alpine tarn, about 300 metres long by 180 metres wide. It was formed by glacial action, like much of the surrounding landscape, when ancient glaciers carved hollows into the schist rock that dominates the region. As the ice retreated, meltwater collected in these depressions, creating compact lakes such as Diamond Lake.
The lake is relatively shallow, which is a key reason it can occasionally freeze during sustained cold spells in winter. Unlike large, deep alpine lakes, Diamond Lake cools quickly, allowing ice to form when overnight temperatures remain low. This physical characteristic underpins its social history: locals know that if any lake in the area is going to freeze solid, Diamond Lake is the most likely candidate.
Diamond Lake is small enough to feel intimate and enclosed, yet large enough to reflect the surrounding Rocky Mountain cliffs on the north side and the sky, giving it an outsized visual impact.
Diamond Lake Walk and Lookouts
The short walk to Diamond Lake takes about 20 minutes, winding through native bush before arriving at the ake’s edge. You can then loop around the lake, adding another 20 minutes or so to the walk.
From the northwest end of the lake, a steeper climb leads to the Diamond Lake Lookout, about 100 metres above, with sweeping views of the lake and surrounding hills and mountains. From there, continue east to the Lake Wānaka Lookout on an easy track for 15 minutes, with panoramic views of Lake Wānaka, its islands, and the wider alpine landscape.
Rocky Mountain Summit Track
If you're seeking a more strenuous route, the Rocky Mountain Summit Track is a rewarding challenge. Taking around three hours return, it traverses rugged terrain with ever-expanding views of the Wānaka basin and Southern Alps. In winter, ice and frost can make sections slippery, so good footwear and caution are essential.
How to Get There
To reach the start of the Diamond Lake and Rocky Mountain Walks from Wānaka, take Mount Aspiring Road around the west side of the lake for approximately 12 kilometres until you reach the car park at the trailhead. The drive takes 10 minutes.
Nearby, you can explore the Motatapu Gorge, Motatapu River Track, Glendhu Bay Track, West Wānaka and Roys Peak Track.
