One of Hawaiʻi’s few navigable rivers, flowing through a valley that holds the Wailua Complex of Heiau, a National Historic Landmark of temples, places of refuge and birthstones that was once a seat of chiefly power. Riverboats run to the fern-draped Fern Grotto, and kayakers paddle upstream.
Why we love it
Paddling the Wailua is the gentlest adventure on the island, with jungle banks, sacred history and calm water, even when the ocean is rough.
Current conditions: Partially reopened Sept. 21, 2026 after Hurricane Lowell: the river and designated landing/trailhead only. Hiking beyond the trailhead and Uluwehi (Secret) Falls are closed, and individual kayakers may not access Fern Grotto (DLNR, Oct. 19, 2026).
What to expect
Most visitors rent kayaks from permitted outfitters or join a guided paddle upriver on flat water to the designated landing. As of October 2026, the classic hike from the landing to Uluwehi (Secret) Falls is closed, and independent kayakers can’t land at Fern Grotto. Only Smith’s riverboat tours are allowed at the Fern Grotto landing. Respect the heiau sites in the valley, keep to the designated landing, and check the DLNR notices page the morning you go.
Know before you go
- Open now
- As of Oct. 19, 2026, the river and designated landing/trailhead are open.
- Closed
- Hiking beyond the trailhead and Uluwehi (Secret) Falls remain closed. There’s no individual kayak access to Fern Grotto.
- Rentals
- Use a DLNR-permitted rental outfitter. Commercial rentals operate under state special-use permits.
- Fees
- Since February 2026, nonresidents pay $5 per person plus $10 per car, card only.
- Sacred sites
- The heiau complex is a National Historic Landmark. Don’t climb on or move stones.
Photo: Christopher from Salem, OR, USA via Wikimedia Commons · CC BY-SA 2.0
