The Wailuku River is a 28.0-mile-long water course on the Island of Hawaiʻi in the Hawaiian Islands. It is the longest river in Hawai'i as well as the largest in the state by mean discharge. Its course lies mostly along the divide between the lava flows of Mauna Kea and those of Mauna Loa to the south. It arises at about the 10,800 feet elevation along the eastern slope of Mauna Kea. It flows generally eastward, descending steeply from the mountain and entering the Pacific Ocean at Hilo.Wailuku River State Park is located along the lower reach of the river. One section of the park includes Rainbow Falls, and another section Peʻepeʻe falls and an area called the Boiling Pots. The upper and middle reaches of the river are known for hunting of introduced game animals. The lower river is a popular destination for swimming and tubing. However the Wailuku River accounts for 25% of the river drowning deaths in the state.
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Address Hilo 96720, United States
Coordinates 19°42'55.413" N -155°7'50.029" E