Big Island Rainforest Adventures: Waterfalls, Ziplines & More

The windward side of the Big Island receives abundant rainfall, creating some of the most spectacular rainforest environments in the United States. From towering waterfalls to lush botanical gardens, the Hilo and Hamakua Coast region offers adventures found nowhere else.

Understanding the Rainforest

Hawaii's tropical rainforests are unique ecosystems:

• Rainfall: The Hilo area receives 130+ inches annually
• Endemic species: Many plants found nowhere else on Earth
• Layers: Canopy, understory, and forest floor each host different life
• Waterfalls: Abundant rain creates countless cascades

Zipline Adventures

Soar through the canopy for a bird's-eye view of the rainforest.

Umauma Falls Zipline

• 9 ziplines over tropical ravines
• Views of three-tiered Umauma Falls
• Dual lines so you can zip with a partner
• Includes botanical garden access

Kohala Zipline

• North Kohala mountain setting
• 9 lines through forest and ravines
• Historical sites along the way
• Includes off-road vehicle adventure

Hawaii Zipline at Akaka Falls

• 7 ziplines near Akaka Falls
• Old sugar plantation history
• Shorter course good for beginners

Waterfall Hikes

Akaka Falls State Park

The iconic 442-foot waterfall is accessible via an easy 0.4-mile loop. The trail passes through a lush tropical garden with bamboo, gingers, and flowering trees.

Rainbow Falls (Waianuenue)

Right in Hilo, this 80-foot waterfall is best viewed in the morning when rainbows appear in the mist. A short trail leads to upper viewing platforms.

Pe'epe'e Falls & Boiling Pots

Just upstream from Rainbow Falls, this series of cascading waterfalls and pools is a local favorite. The "boiling" effect comes from water churning through the rock formations.

Hi'ilawe Falls

At 1,450 feet, this is Hawaii's tallest accessible waterfall. It's visible from the Waipio Valley lookout, though getting closer requires a challenging hike into the valley.

Botanical Gardens

Hawaii Tropical Botanical Garden

A world-class 40-acre garden in scenic Onomea Bay. The collection includes over 2,000 species from around the tropics, arranged along a dramatic coastal ravine.

• Boardwalk trails suitable for all ages
• Ocean overlooks and waterfall
• One of the world's largest palm collections
• Allow 2-3 hours

World Botanical Gardens

A 300-acre garden featuring rainforest trails, orchid and tropical fruit gardens, and views of the three-tiered Umauma Falls.

Pana'ewa Rainforest Zoo

A free zoo set in natural rainforest. Home to the only Bengal tiger in Hawaii and many tropical animals in lush surroundings.

Scenic Drives

The Hamakua Coast

Highway 19 from Hilo to Waimea follows the stunning Hamakua Coast. Don't miss:

• Onomea Scenic Route: 4-mile detour through rainforest
• Laupahoehoe Point: Historic fishing village on a peninsula
• Waipio Valley Lookout: Dramatic views of the "Valley of Kings"

Scenic Route 19

Known as the "Hilo-Hamakua Heritage Coast," this road passes numerous waterfalls, botanical gardens, and historic sites.

Rainforest Tips

• Expect rain: It can rain anytime—bring a light rain jacket
• Wear closed-toe shoes: Trails can be muddy and slippery
• Bug spray: Mosquitoes live in the rainforest
• Start early: Mornings are often clearer
• Stay on trails: Off-trail areas can be dangerous
• Don't drink stream water: Despite how clean it looks

Best Time to Visit

The rainforest is lush year-round, but conditions vary:

• Summer: Slightly drier, warmer
• Winter: More rain but fuller waterfalls
• Morning: Often clearer before afternoon clouds build