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Waterfall · Hilo, Hawaii
Rainbow Falls
A drop of about 24 meters on the Wailuku River, a few minutes from downtown Hilo, over a lava cave. On sunny mornings the water mist often forms rainbows, which gave the place its name.
Illustrative images. The pictures in this guide are illustrations based on the real place, not photographs, and may differ from it.
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About Rainbow Falls
Rainbow Falls, called in Hawaiian Waiānuenue, “water of the rainbow,” is in Wailuku River State Park within Hilo’s urban area. The river drops about 24 meters into a wide basin surrounded by banyan trees, ferns and gingers.
Behind the falls is a grotto formed in an old lava flow. According to Hawaiian tradition, Hina, mother of the demigod Maui, lived there. The viewpoint, a few steps from the parking area, faces the waterfall, and a staircase leads to a higher spot next to a banyan tree.
The name comes from the rainbows that often appear in the mist when the morning sun hits the water. The waterfall’s flow varies a lot: after rainy days, common in Hilo, the falls become wide and muddy; in drier periods it diminishes.
About 2 km upstream in the same park are the Boiling Pots, a series of pools where the water seems to boil as it passes between lava rocks. Swimming in either place is not allowed.
Before you go
Practical information
Cidade Turismo reviews its information regularly, but something may have changed. Check with the place before planning your trip.
How much time to set aside
About 20 to 30 minutes.
Best time
In the morning, when it’s sunny and the mist tends to form rainbows. After rains, the waterfall is fuller.
How to get there
Via Waiānuenue Avenue, about 3 km west of downtown Hilo, with parking next to the viewpoint. There is no entrance fee.
Tip
Combine the stop with the Boiling Pots upstream and with downtown Hilo. Do not cross the railings: the rocks are slippery.
Official website
Get your questions answered
Frequently asked questions about Rainbow Falls
Where is Rainbow Falls located?
In Wailuku River State Park, about 3 km from downtown Hilo, with a viewpoint next to the parking area.
When does the rainbow usually appear at Rainbow Falls?
In the morning, when the sunlight hits the falls’ mist.
Can you swim at Rainbow Falls?
No. Swimming is not allowed, and access to the base of the falls is closed.