Hamurana Spring is the deepest natural fresh water spring on the North Island

North Island

The North Island is one of the two main islands of New Zealand, separated from the much less populous South Island by Cook Strait. The island is in area, making it the world's 14th-largest island...

 of New Zealand

New Zealand

New Zealand is an island country in the south-western Pacific Ocean comprising two main landmasses and numerous smaller islands. The country is situated some east of Australia across the Tasman Sea, and roughly south of the Pacific island nations of New Caledonia, Fiji, and Tonga...

. Located to the north east of Lake Rotorua

Lake Rotorua

Lake Rotorua is the second largest lake in the North Island of New Zealand by surface area, and covers 79.8km2. With a mean depth of only 10 metres it is considerably smaller than nearby Lake Tarawera in terms of volume of water. It is located in the Bay of Plenty region...

, the spring emerges from a rocky area within a Department of Conservation reserve. The spring is 920 feet (280 m) above sea level and is approximately 15 metres (50 ft) deep. It produces an estimated 4 million litres of crystal clear water per hour at a fairly constant temperature of 10 degrees Celsius. The spring flows as a stream for approximately one kilometre before joining Lake Rotorua. In summer the stream is home to rainbow trout

Rainbow trout

The rainbow trout is a species of salmonid native to tributaries of the Pacific Ocean in Asia and North America. The steelhead is a sea run rainbow trout usually returning to freshwater to spawn after 2 to 3 years at sea. In other words, rainbow trout and steelhead trout are the same species....

who prefer the cooler temperature of the spring water.