Lake Rotoiti – Kerr Bay and Jetty

Kerr Bay is Lake Rotoiti’s main road-accessible shore at St Arnaud, and its small wooden east jetty reaches out over the glacial lake. It’s a satisfying stop even if you only walk onto the pier and look around; stay longer for the short Bellbird Walk or to watch the large eels often seen below the jetty. The clear water and steep mountain walls are the draw, and the shore is easy to reach from the road.

From the pier, look south across the lake toward Pourangahau (Mount Robert) and the forested ranges. For the classic picture, start on shore and let the timber jetty lead out toward the water and mountains. When the lake is still, the slopes can reflect in the surface; wind and cloud change the view quickly, so treat that as a bonus rather than a promise.

Bellbird Walk starts at the east-jetty car park and makes a 15-minute wheelchair-standard loop through red beech forest and wetland, with interpretive panels along the way. If you want a longer forest walk, Honeydew is a 1.7-kilometre loop that takes about 45 minutes, reached as an offshoot. Either makes Kerr Bay more than a photo stop without turning the visit into a major hike.

People often pause to look for the large eels below the jetty. Eels in the park’s lakes and rivers are protected, so keep the visit to watching them beneath the pier.

The Travers glacier occupied this valley roughly 20,000 to 12,000 years ago, carving the deep basin that holds Lake Rotoiti. Rivers still carry sediment into the lake, gradually filling a hollow made by much larger forces. The mountains around the shore make that glacial shape easier to read from the water’s edge.

Rotoiti means “little lake.” European explorers briefly called it Lake Arthur in honour of Captain Arthur Wakefield, but the Māori name endured. It’s a useful reminder that the lake already had a name long before it became a popular stop at St Arnaud.

The nearby red beech forest and wetland are part of the Rotoiti Nature Recovery Project, a mainland-island predator-control effort covering more than 5,000 hectares of honeydew beech forest. That honeydew supports native birds including kākāriki, kākā, tūī and korimako (bellbirds). Bellbird and Honeydew walks are the easiest way to see the forest setting beyond the lakefront.