On Kauaʻi’s east side, the Wailua River runs from the island’s interior to the coast through a green valley. It is one of Hawaiʻi’s few navigable rivers, and kayaking or paddleboarding lets you follow its calm waters upstream. Some outings combine paddling with a hike to Uluwehi Falls, also called Secret Falls; Fern Grotto is another river destination, reached by boat or kayak. The valley also has cultural significance as the historic home of Hawaiian chiefs. Set aside several hours if you plan to paddle and hike.
Paddling upriver
The Wailua is one of Hawaiʻi’s few navigable rivers, and its calm water makes it a popular route for kayaking and paddleboarding. Outfitters in the Wailua area rent boats and boards, and guided trips are also available. You can paddle on your own or join a tour; the river is approachable for beginners, though a full outing takes both time and stamina.
A common trip combines an upstream paddle with a walk to Uluwehi Falls, better known as Secret Falls. One route covers about two miles on the river before reaching the trailhead, followed by a hike through the valley. The round trip, including time at the falls, can take about four hours. Expect a moderate walk and uneven, muddy ground after rain. Water-friendly footwear is useful on both the riverbank and trail.
Fern Grotto and the river valley
Fern Grotto is a lava-rock cave reached from the Wailua area by riverboat or kayak. Tropical ferns hang from its roof, and the cave’s rock walls form a natural amphitheater. Riverboat trips travel about two miles to the grotto, followed by a short walk through the rainforest.
The river lies within a culturally significant part of Kauaʻi. The broader Wailua area was associated with the aliʻi, the Hawaiian chiefly class, and historic and cultural sites remain in the region. Wailua means “two waters” in Hawaiian, a name linked to the meeting of river and ocean in this landscape.
Lookouts and waterfalls
You can also appreciate the valley without taking to the water. Lookout points give views across the river and toward the coast, where waterways meet. Wailua Falls and Opaekaʻa Falls are among the waterfalls in Wailua River State Park, though they are separate stops from the Uluwehi Falls kayak-and-hike route.
If you are planning an active day, account for the time on the water as well as the walk. Rain can make the trail slick, and the combination of paddling and hiking calls for reasonable stamina. Check your chosen outfitter’s arrangements before setting out, especially if you want a guided trip or a specific destination.
Preguntas frecuentes
Can you kayak on the Wailua River?
Yes. Kayaks and paddleboards can be rented from local outfitters, and guided trips are also available.
How long does the kayak trip to Secret Falls take?
Allow about four hours for the round trip, including time at Uluwehi Falls. The outing includes paddling and a hike.
What should I wear for the hike to Uluwehi Falls?
Wear water-friendly shoes. The trail can be muddy and slippery after rain.
Can you visit Fern Grotto from the river?
Yes. Fern Grotto can be reached by riverboat or kayak; boat trips include a short walk through the rainforest.
