Explore the Wailua River & Waterfalls on the Royal Coconut Coast
The Wailua River is the largest navigable river in all of Hawaiʻi. Numerous rivers and streams flowing from the crater of Mount Waiʻaleʻale, located at the center of Kauaʻi, feed this important waterway. As you drive inland along the river, you’ll enjoy breathtaking views of lush mountains, tropical valleys, and cascading waterfalls.
A short drive up Māʻalo Road (Highway 583) leads to Wailua Falls, where twin waterfalls plunge nearly 100 feet into a pool below. The dramatic setting and easy roadside access make this one of Kauaʻi’s most photographed waterfalls.
Another scenic stop can be found along Kūamoʻo Road (Highway 580) at the overlook for ʻOpaekaʻa Falls. The name means “rolling shrimp,” referring to the freshwater shrimp once abundant in the stream below. The overlook offers sweeping views of the waterfall and surrounding valley.
Continuing past the ʻOpaekaʻa Falls overlook, you’ll pass through a quiet residential area. Beyond the neighborhood lies a hidden gem: Keahua Forestry Arboretum. This peaceful park is a favorite among nature lovers and features towering monkeypod, eucalyptus, and mango trees alongside a beautiful mountain stream. Several trails wind through the area, and the stream contains inviting natural pools where visitors can cool off with a refreshing dip.
Wailua River State Park
Wailua River State Park is home to some of the most significant cultural and historical sites in Hawaiʻi. In ancient times, the entire Wailua River valley was reserved exclusively for Hawaiian royalty.
Today, visitors can explore the river by kayak or boat tour. One of the most popular destinations is the Fern Grotto, a lava rock cave covered with lush tropical ferns. Boat tours travel up the river to the grotto, offering visitors a chance to experience this unique natural amphitheater.
Those seeking adventure often choose to kayak the river. From the riverbank, a short hike leads to a hidden waterfall known as Uluwehi Falls, often called Secret Falls, a beautiful cascade tucked deep within the rainforest.
Sacred Sites of the Wailua Valley
Along the Wailua River lies one of Kauaʻi’s most sacred cultural sites: Holoholoku Heiau, home of the famous Birthstones of Kauaʻi. Two large, smooth stones were traditionally used to support royal mothers during childbirth. In ancient times, it was believed that all high chiefs of Kauaʻi should be born here. Among those born at this sacred site was King Kaumualiʻi, the last ruling king of Kauaʻi.
Royal families from neighboring islands also traveled to this sacred location to give birth.
Nearby stands the Bell Stone, a reddish rock that produces a distinctive ringing sound when struck. According to tradition, a kahuna (priest) would strike the stone to announce the birth of a royal child.
