Rainbow Falls

Rainbow Falls is an 80-foot Hilo waterfall in Wailuku River State Park, known for easy lookout access and morning mist rainbows.

Rainbow Falls, Big Island

Rainbows are a rare sight for most of us, but not when you're on the Hilo side of the Big Island of Hawaii. Just a short drive from Hilo is the aptly named Rainbow Falls, so named because of the morning rainbows that appear as the sun shines through the mist. The best thing about it is its accessibility. Unlike many other waterfalls on the Big Island, Rainbow Falls doesn't take a long hike or a four-wheel drive vehicle to access.

The source of the waterfall is Wailuku River, the longest in the Hawaiian archipelago at 26 miles (42 km) long. The river used to be impassable during heavy rain, until locals built three large bridges that traverse the water and offer excellent views. These bridges also provide a direct route to the falls for both drivers and hikers.

The area around the falls is surrounded by large mango trees, which make it feel secluded despite being close to the city. Visitors can hear the full force of the water as it falls 80 feet (24 m) to the rushing pool below, a turquoise river surrounded by beautiful ginger shrubs. The Hawaiian name for Rainbow Falls is Waianuenue, meaning “rainbow seen in water.”

Behind the waterfall is a deep cave believed to be the home of Hina, an ancient Hawaiian goddess. This is where the famed rainbow is commonly seen, as the sun reflects off the mist created by the water. The walk to the cave is rough and slippery, so tread carefully and make sure to wear sturdy shoes. The cave is worth exploring in the early morning, when there's enough light to see the rock formations. Beyond the Rainbow Falls lookout there is a short, unpaved path that leads from the left side of the parking lot to top of the waterfall.

Key Features

Easy Hilo stop: Minutes from downtown Hilo
80-foot waterfall: Drops into the Wailuku River basin
Morning rainbows: Mist and sunlight may create rainbow views
Waianuenue name: Hawaiian name means rainbow seen in water
State park setting: Part of Wailuku River State Park
No hike needed: Main overlook is close to parking
Hina cave: Cultural story connected with the waterfall
No swimming: River currents and hidden hazards are dangerous
Visitor planning: Go early for lighter crowds and better light

Frequently Asked Questions

Where is Rainbow Falls located?

Rainbow Falls is located on Rainbow Drive in Hilo, within Wailuku River State Park on Hawaii Island.

Why is it called Rainbow Falls?

The waterfall is named for the rainbows that may appear in the mist when morning sunlight reaches the falls.

Can visitors see Rainbow Falls without hiking?

Yes. The main lookout is close to the parking area, making Rainbow Falls one of the easiest Big Island waterfalls to visit.

Can visitors swim at Rainbow Falls?

No. Rainbow Falls is not safe for swimming because the Wailuku River can have strong currents, hidden hazards and sudden changes in water flow.

When is the best time to visit Rainbow Falls?

Morning usually gives the best chance of seeing a rainbow in the mist, though clouds, rain and river flow can affect the view.