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Hilo's Volcanic Wonders
The Living Land: Waterfalls, Lava Caves & Natural Wonders Forged by Fire
Written by a Local Hilo Expert
Leilani AkoChasing Waterfalls: The Liquid Soul of the Rainforest
The huge rainfall Hilo gets has to go somewhere. It carves paths through the volcanic rock. This creates a network of rivers and streams that drop toward the ocean. This is Hilo's famous "waterfall corridor." A collection of some of the most beautiful cascades in all of Hawaiʻi.
ʻAkaka Falls State Park: The Giant of the Hāmākua Coast
Just a 25-minute drive north of Hilo along the stunning Hāmākua Coast lies ʻAkaka Falls State Park. It's home to perhaps the most famous waterfall on the island. A pleasant, 0.4-mile paved loop trail guides you through a classic tropical rainforest. A world of hanging ferns, towering bamboo groves, and wild orchids.
The air grows cooler as you walk. The sound of rushing water gets louder as you approach the main sight. You'll first catch a glimpse of the 100-foot Kahuna Falls. Then the path circles around to the amazing main event. The 442-foot ʻAkaka Falls plunges in a single, beautiful ribbon of white water. It falls into a deep, stream-cut gorge below.
Legend of ʻAkaka Falls: According to legend, the falls are named for the warrior ʻAkaka. He was overcome with guilt after having affairs. He leaped from the cliff and was turned into the waterfall.
Leilani's Tip: The park is open daily from 8:00 AM to 5:00 PM. There's an entrance fee of $10 per vehicle or $5 per pedestrian (credit card only). The paved path can be slippery from mist and rain. Wear sturdy, closed-toe shoes. Arrive early in the morning to avoid the biggest crowds and experience the falls in the soft morning light.
Wailuku River State Park: A Realm of Rainbows and Legends
You don't have to travel far to see Hilo's water wonders. Wailuku River State Park sits right on the edge of town. It contains two of the area's most famous and easy-to-reach sights.
🌈 Waiānuenue (Rainbow Falls)
This powerful, 80-foot waterfall is amazingly easy to visit. The main lookout is just steps from the parking lot. Its Hawaiian name, Waiānuenue, means "rainbow water." On sunny mornings, especially around 10 AM, the rising sun hits the mist at the perfect angle creating a bright rainbow at its base.
Best viewing: Morning with sun at your back
💫 Peʻepeʻe Falls & The Boiling Pots
Just a mile and a half upriver from Rainbow Falls, the water rushes through a series of terraced pools connected by underground lava tubes. The water churns and bubbles up from below as if boiling because of hexagonal basalt columns formed by slowly cooling lava.
Warning: Swimming here is very dangerous - for respectful watching only
Into the Earth: Kaumana Caves
Just a ten-minute drive from downtown Hilo up Kaumana Drive (Saddle Road), you'll find a simple county park that hides an amazing secret. Kaumana Caves State Park is the entrance to a massive lava tube. This underground conduit formed during a Mauna Loa eruption in 1881. This was the very lava flow that threatened to consume Hilo before it famously halted. Many attribute this to the prayers and offerings made by Princess Ruth Keʻelikōlani to the goddess Pele.
A steep concrete staircase leads down into a collapsed "skylight." This is a pit in the earth where the lava tube's ceiling fell in. It reveals two dark, gaping entrances. The air immediately grows cool and damp. The cave to the right is a massive cavern that you can explore for a few hundred feet before it narrows. The cave to the left is more winding and plunges into total darkness quickly. You can explore about two miles of the tube system before it enters private property.
⚠️ Leilani's Safety Tip
This is a wild cave, not a theme park attraction. The ground is uneven, jagged, and often wet. Sturdy, closed-toe shoes are required. Do not attempt to explore with flip-flops. Each person in your group must have their own reliable flashlight or headlamp, plus backups. The darkness inside is complete.
💧 Waterfall Quick Guide
- ʻAkaka Falls: 442 feet
- Rainbow Falls: 80 feet
- Kahuna Falls: 100 feet
- Best Time: Morning light
- Park Fee: $10 vehicle
🎒 What to Bring
- Waterproof hiking shoes
- Rain jacket
- Flashlight for caves
- Camera & waterproof case
- Bug spray
- Water bottle
📸 Photography Tips
- Rainbow Falls 10 AM
- ʻAkaka Falls 8-9 AM
- Boiling Pots After rain
- Kaumana Caves Bring flash
Beaches of a Different Color: Hilo's Volcanic Coastline
Hilo's beaches are a direct reflection of our volcanic setting. You won't find miles of white powder here. Instead, you'll discover shores painted in dramatic shades of black and flecked with green olivine crystals.
Richardson Ocean Park: Black Sand Paradise
This is the best all-around beach in Hilo and a local favorite for families. Its small pockets of black sand are formed from basaltic lava that shattered into tiny pieces when it hit the cold ocean water millions of years ago. The main draw here is the amazing snorkeling. A series of lava rock breakwaters creates calm, protected coves full of tropical fish.
This is also one of the best places on the island to see honu (Hawaiian green sea turtles) peacefully grazing on seaweed or resting on the shore. Remember, these are protected animals. It is illegal to touch them and you must keep a respectful distance. At least 10-15 feet on land and 50 yards in the water. The park has lifeguards, restrooms, and showers, making it a perfect spot for a full day of fun.
Local Kine Swims: Secret Spots & Sacred Warnings
For those willing to venture off the beaten path, Hilo offers some truly magical swimming holes. You can find beautiful, clear pools in the river above Rainbow Falls. Access these via the trail to the right of the lookout. Or at a spot locals call "Six Tons" along the scenic Old Mamalahoa Highway. These spots can be perfect on a calm, sunny day.
🌊 Sacred Warnings: The Power of Wailuku River
The Wailuku River's name means "Destructive Waters" for a reason. It is steeped in legends of Kuna, a great moʻo (lizard or dragon) who battled the goddess Hina. His fury is said to still churn in the river's depths. This story serves as a sacred warning.
The river is prone to violent, sudden flash floods caused by heavy rain in the mountains (mauka). This can happen even when it's sunny in Hilo. If you hear a sudden roaring sound or feel a cool wind blowing downstream, get out of the water immediately. These are signs that a wall of water is already on its way.
Richardson Ocean Park
Black sand beach with snorkeling, sea turtles, and family-friendly amenities including lifeguards and facilities.
Safe for families
River Swimming Holes
Hidden pools above Rainbow Falls and along scenic highways - perfect on calm, sunny days.
Experienced swimmers only
Wailuku River
Beautiful but dangerous - prone to flash floods and hidden currents. Admire from designated viewing areas.
Extreme caution required
Traveling pono becomes a matter of life and death.
Hidden currents and underwater lava tubes can trap even the strongest swimmers. Never swim alone, and never enter the water if it looks murky or is flowing swiftly. Admire the river's power, but never, ever underestimate it.