The Wailuā River is a 2.0-mile-long (3.2 km)[1] river on the island of Kauaʻi in the U.S. state of Hawaii. It is formed by the confluence of its North and South forks just west of Wailua and enters the Pacific Ocean at . It is the only navigable river (by boats larger than kayaks) in the Hawaiian Islands. It is a center of activity for locals and visitors in the form of boat tours to Fern Grotto, kayaking and water skiing.
The North Fork begins near the Waiʻaleʻale crater at coordinates and flows 12.2 miles (19.6 km)[1] east to its junction with the South Fork. The South Fork forms at the junction of several streams southwest of Hanamaulu and flows 8.1 miles (13.0 km) east,[1] over Wailua Falls, to its junction with the North Fork.
Other points of interest along the river system include a bird refuge, Halokila Hawaiian Village, Secret Falls and a pool for rope jumping.