Rainbow Falls

Rainbow Falls is an 80-foot waterfall in Hilo's Wailuku River State Park, with easy lookout access, morning mist rainbows and a lava cave connected with Hina.

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

80-foot waterfall in Wailuku River State Park
Main lookout is close to the parking area
Morning mist can create rainbow colors near the falls
Hawaiian name Waianuenue refers to rainbow water
Lava cave behind the waterfall is connected with Hina
Minutes from downtown Hilo
Part of the Wailuku River waterfall area
Short visit that can be paired with Pe'epe'e Falls and Boiling Pots
No swimming or river access from the main viewpoint
Wet pavement and railings require extra care after rain

Frequently Asked Questions

What is the Hawaiian name for Rainbow Falls?

The Hawaiian name is Waianuenue, commonly translated as rainbow water or rainbow seen in water. The name comes from the way sunlight and waterfall mist can create rainbow colors near the cave.

Why is Hina connected with Rainbow Falls?

Hina, a figure in Hawaiian stories, is associated with the cave behind the waterfall. The cave and falling water give the viewpoint a cultural layer beyond its easy roadside access.

How is Rainbow Falls different from Akaka Falls?

Rainbow Falls is close to downtown Hilo and has a main viewpoint near the parking area. Akaka Falls is taller and reached by a rainforest loop trail north of Hilo.

Why are rainbows most common in the morning?

Morning sunlight is more likely to angle into the mist at the base of the waterfall. Cloud cover, river flow and the amount of spray can change what you see from day to day.

What photo details stand out at Rainbow Falls?

The main photo view includes the waterfall, the dark cave behind it, the river pool below and greenery around the gorge. A vertical frame often captures the drop and cave together.