Wailua River

Protected by Wailua River State Park, the Wailua is the largest navigable river in the Hawaiian archipelago (a feature found only on the island of Kauai). As the 20-mile (32-kilometer) river meanders through a lush valley, it passes through jungle landscapes and past two notable waterfalls: Opaekaa Falls and Wailua Falls.

The best way to soak in the natural beauty of the Wailua River is from the water itself, and there are several options to do so. Many travelers paddle the waters by kayak; these trips often include a short hike to a waterfall for swimming. It’s also possible to explore by stand-up paddleboard or outrigger canoe. More comprehensive island tours sometimes include an open-air boat trip along the Wailua River to the Fern Grotto, a spectacular lava rock cave surrounded by draping ferns. Those traveling by car can follow the north side of the river along Kuamoo Road (Highway 580).

• The Wailua River offers outdoor recreation for a broad range of travelers.

• Don’t forget to bring along sunscreen, sunglasses, and hat, as not all portions of the river are shaded.

• Wear comfortable shoes suitable for walking over uneven surfaces.

• All state park facilities are ADA accessible.

The Wailua River enters the ocean on the island’s east coast, near the settlement of Wailua. Most visitors get to the river as part of a guided tour with included transportation from Kauai hotels.

The best time for outdoor adventure in Kauai is in fall (September to November) and spring (April to June) when the weather is at its best. Expect frequent showers during the winter peak season (December to March).

The Wailua River is more than just a natural wonder. To ancient Hawaiians, it was considered one of the most sacred places on Kauai. At one time, seven differentheiau (temples) dotted its shores. Visitors can learn more at the Wailua Complex of Heiau, a National Historic Landmark and former hub of chiefly power.

That depends on the tour you pick. A range of Wailua River tours are available, from leisurely river cruises to active kayaking excursions; most last at least half a day or longer if paired with nearby attractions. Generally, prices begin around $100 per person for a shorter excursion and go up.

At a minimum, you’ll spend more than 3 hours on a Wailua River cruise—and if you decide to explore by kayak or pair your boat tour with visits to area attractions, you could spend the whole day. The river itself is around 20 miles (32 kilometers) long.

If you plan to go on a kayaking tour of the Wailua River, set aside at least half a day—most tours begin at 5 hours and go up from there, depending on whether other nearby attractions (like the Secret Falls or the Fern Grotto) are visited.

While it is possible to swim in sections of the Wailua River, generally, the best way to discover it is by boat or kayaking tour—and then be rewarded with perfect swimming conditions later. Many tours stop at the Secret Falls, where an idyllic swimming hole awaits visitors.

The only way to reach the Fern Grotto—located at the beginning of the South Fork of the Wailua River—is by water. Many kayaking tours will stop at the site, and visitors can explore the area. Just don’t expect to enter the cave, which is sacred and off-limits.

Yes, kayaking the River Wailua is worth it. The largest navigable river in the Hawaiian Islands, the Wailua River has long been considered a sacred landmark by Native Hawaiians. It’s also famed for its slow-moving beauty and offers access to popular attractions like the Secret Falls and Fern Grotto.