Rainbow Falls State Park | Hilo

Rainbow Falls State Park is a waterfall located in Hilo, Hawaii, on the island of Hawaii.

The park features a 80-foot waterfall cascading over a lava rock cliff into a pool below.

Visual Characteristics

The waterfall, known as Waianuenue, drops 80 feet (24 meters) over a sheer cliff face composed of basaltic lava rock. The water is typically clear, and the surrounding vegetation is dense, consisting of tropical plants such as ferns, orchids, and banyan trees. The cliff face is often covered in moss and vines. The pool at the base of the falls is approximately 10 feet deep.

Location & Access Logistics

Rainbow Falls State Park is situated within the city limits of Hilo, approximately 2 miles (3.2 kilometers) north of the Hilo city center. Access is via Waianuenue Avenue (State Highway 200). Parking is available in a designated lot adjacent to the falls. Public transportation options include the Hele-On Bus service, with routes that stop near the park entrance.

Historical & Ecological Origin

The waterfall is formed by the Wailuku River, which originates in the volcanic highlands of Mauna Loa. The river flows through lava tubes and underground channels before emerging and creating the falls. The basaltic rock formations are a result of ancient volcanic activity. The park was established to preserve the natural beauty of the falls and its surrounding environment.

Key Highlights & Activities

Viewing the waterfall from the designated overlook is the primary activity. The falls are best observed in the morning, typically between 9:00 AM and 10:00 AM, when sunlight refracts through the mist, creating rainbows. Limited hiking trails are available, offering different perspectives of the river and surrounding flora. Access to the pool at the base of the falls is restricted.

Infrastructure & Amenities

Restrooms are available within the park. Shaded areas are provided by the natural tree canopy. Cell phone signal (4G/5G) is generally available. Food vendors are not present within the park, but are located in nearby Hilo.

Best Time to Visit

The best time of day for viewing rainbows is between 9:00 AM and 10:00 AM, especially on sunny mornings. The best months for visiting are generally from April to September, when rainfall is typically lower, increasing the likelihood of clear skies. The falls are accessible year-round.

Facts & Legends

Local legend states that a moʻo (lizard goddess) named Hina lives in the cave behind the waterfall. It is also said that Hina would bathe in the pool at the base of the falls. A specific tip for visitors is to check the weather forecast; a sunny morning following rain can produce the most vivid rainbow displays.

Nearby Landmarks

• Lyman Museum & Mission House (1.5km Southwest)
• Hilo Farmers Market (2.0km Southwest)
• Pacific Tsunami Museum (2.5km Southwest)
• Richardson Ocean Park (5.0km Southeast)
• Hawaii Tropical Bioreserve & Garden (8.0km Northeast)