Swim the Night

At eight in the evening, the waters of Lake Tikitapu slip into the darkness and light up with the glowing trails of two hundred swimmers. Held in the Bay of Plenty near Rotorua, Swim the Night is an open water swimming event hosted in the calm freshwater of this New Zealand lake. Rather than a competitive race against the clock, the evening is designed as a 2.5-kilometre SwimXperience where swimmers move at their own rhythm. To maintain safety and an intimate atmosphere out on the dark water, entry is strictly limited to 200 participants, all of whom must be at least 16 years old. Taking to a lake at night might seem unnerving, but the event structure is designed to make the experience serene and secure.

Every swimmer is required to wear a personal safety tow float equipped with an interior light. Gliding stroke after stroke, these glowing globes create a luminous ribbon of reflections weaving across the pitch-black surface. With water so remarkably clear that every reach feels clean and effortless, participants are invited to pause halfway through, roll onto their backs, and float quietly beneath the southern stars while listening to the unbroken silence of the lake.

Lake Tikitapu: a volcanic crater of pumice and rhyolite

Lake Tikitapu is part of the Ōkāreka Embayment, a structural volcanic feature situated in New Zealand's Taupō Volcanic Zone. The embayment itself forms part of the sprawling Ōkataina Caldera, an enormous volcanic system that has vented more than 80 cubic kilometres of magma across the landscape during the last 21,000 years. This geological cradle embraces Lake Tikitapu alongside neighbouring Lake Ōkāreka, the eastern portion of Lake Rotokākahi, and the western margins of Lake Tarawera. The swimming basin itself is a collapsed volcanic crater that plunges to a maximum depth of 27.5 metres. It was walled off roughly 15,635 years ago during the Rotoroa eruptive sequence, when a massive flow of rhyolitic lava formed a natural dam and sealed the depression.

While swimmers only encounter the black stillness of the lake during the night swim, daylight reveals an extraordinary aqua blue color across the water. This striking hue is created by the reflective bed of pale volcanic pumice and rhyolite resting across the lake floor.

Lake Rotokākahi: the sacred green twin across the lava dam

That same rhyolitic lava dam formed 15,635 years ago still stands today, forming a narrow barrier that separates Lake Tikitapu from adjacent Lake Rotokākahi on the western edge of the caldera. Despite lying right next to each other, the two water bodies present completely different faces. In stark contrast to Tikitapu's clear blue, Rotokākahi displays a brilliant emerald green coloration produced by its shallow, sandy bottom. Inside Lake Rotokākahi, two islands rise from the water: Punaruku Island resting in the western arm and Motutawa Island occupying the southern reach.

The legend of Tikitapu and the eruption of Mount Tarawera

According to local tradition, the name Tikitapu recalls a sacred greenstone tiki lost by a chief's daughter while she bathed in the lake, and that aura of precious heritage still surrounds its waters, alongside memories of the raw geological upheaval that later shook the surrounding valleys. About five kilometres from the lake, along the shore of Lake Tarawera, once stood the bustling settlement of Te Wairoa. In the early hours of June 10, 1886, Mount Tarawera erupted violently, burying the village under an avalanche of volcanic mud and ash that reached a depth of nearly a metre. The violence continued into July, when a severe earthquake ruptured the landscape, carving an immense fissure 230 metres long and up to 30 metres deep straight across the road connecting Rotorua to Te Wairoa.

Whakarewarewa Forest and the shores of Lake Tikitapu

Lake Tikitapu is ringed by native bush mingled with the towering exotic conifers of the Whakarewarewa Forest, creating a quiet natural arena that keeps the lake surface remarkably calm. A 5.5-kilometre walking track loops all the way around the shore, winding through the shade of the trees and offering scenic vantage points across the water. Out in the clear depths, rainbow trout and brook trout patrol the shallows and sunken contours of the old volcano. To protect this sensitive freshwater habitat from the introduction of invasive freshwater clams, Biosecurity New Zealand requires everyone entering the water to follow the strict 'Check Clean Dry' cleaning protocol on all gear. During the day, the lakefront reserve is a relaxed recreational hub equipped with picnic tables, barbecues, and playgrounds, where visitors gather for swimming, boating, and water skiing. But as dusk falls and the picnic areas empty, the lake transforms into a quiet sanctuary, ready for two hundred illuminated floats to glide through the water beneath the southern night sky.