This canyon on Kauai glows red, green and gold above the Pacific

It’s not Arizona’s Grand Canyon

You’ve probably heard someone call Waimea Canyon the Grand Canyon of the Pacific. Fair enough, but the comparison stops at size.

This gorge on the west side of Kauai cuts 10 miles long, a mile wide and more than 3,000 feet deep through tropical volcanic basalt, not sedimentary rock.

Iron in the old lava turns the walls red and orange, and bright green vegetation fills every crevice and ledge. After a good rain, waterfalls appear along the cliff faces.

The name Waimea itself means “reddish water,” and you’ll see why the moment you look down at the river.

A volcano collapsed and the rain never stopped

Kauai is the oldest of the large Hawaiian islands, built by a shield volcano with lava flows dated to roughly 5 million years ago.

About 4 million years ago, a large section of that volcano collapsed and left a depression on the western side. The Waimea River went to work on the weakened zone, carving deeper through layers of basalt ever since.

Most of the water comes from nearby Mount Waiale’ale, one of the wettest spots on Earth, averaging around 450 inches of rain per year. The exposed canyon walls now read like a cross-section of the island’s history.

Highway 550 climbs 4,000 feet from the coast

Two roads lead to the canyon. Highway 550 starts in the small town of Waimea on the coast, and Koke’e Road starts in Kekaha.

The two merge as they climb. Either way, you gain about 4,000 feet of elevation, and the landscape shifts from dry, sun-baked lowlands to forested uplands.

The canyon opens up on your right, and pullouts line the road the whole way.

Without stops, the drive from Waimea to the end of the road takes roughly 45 minutes, but you’ll want to stop more than once.

Your first wide look at the red canyon walls

The Waimea Canyon Lookout near mile marker 10 gives you the widest view of the gorge.

From the railing, layered red and brown cliff walls drop away, and the Waimea River shows up as a silver thread far below. On clear mornings, you can see all the way to the ocean at the canyon’s mouth.

Tropical birds soar above the gorge, and you might hear wild goats bleating on the sheer faces below. Afternoons bring clouds rolling in from the windward side, filling the canyon with mist.

Spot the Forbidden Island from Pu’u Hinahina

Near mile marker 13, the Pu’u Hinahina Lookout sends your gaze straight down the length of the canyon toward the sea.

A short trail off the parking area leads to a separate platform where, on clear days, you can make out the outline of Ni’ihau about 17 miles offshore.

The island is privately owned and generally closed to outsiders, so this distant silhouette is as close as most people ever get. The tiny crescent of Lehua islet sits nearby.

Several hiking trails along the canyon rim start from this same lookout.

Waipo’o Falls drops 800 feet down the far wall

Waipo’o Falls cascades roughly 800 feet on the opposite wall of the canyon, and you can see it from several lookouts along the road. How much water it carries depends entirely on recent rain.

Some days it runs as a thin white ribbon. Other days it rushes.

The best roadside view comes from the Pu’u ka Pele pullout between mile markers 12 and 13, where you’ll find a picnic area.

Hikers can reach the top of the falls on the Canyon Trail, a moderate 3- to 4-mile round trip through forest along the rim.

A rare plant blooms once and dies on this trail

The Iliau Nature Loop near mile marker 8 covers just 0.3 miles and gives you canyon views with almost no effort. The trail takes its name from the iliau plant, found only on Kauai.

It belongs to the sunflower family, lives up to 10 years, sends up tall stalks of yellow flowers between May and July, and then dies.

Interpretive signs along the loop point out native species like koa trees and ‘ohi’a lehua. The trail also gives you a look into Waialae Canyon, a tributary gorge that feeds the main canyon.

The Kukui Trail drops 2,000 feet to the river

Going down is the easy part. The Kukui Trail starts at the same trailhead as the Iliau Nature Loop but descends 2,000 feet over about 2.5 miles to the Waimea River on the canyon floor.

You’ll pass through forests of kukui nut trees with views of Waialae Falls across the opposite wall, and wild goats are common along the ridges.

The steep climb back up in sun and heat is the real test, so carry plenty of water. At the bottom, hikers with permits can camp at the Wiliwili campsite.

Look for Hawai’i’s state bird near the lookouts

The nene, an endangered goose and Hawai’i’s state bird, sometimes shows up near the lookouts and along the road through the park.

Higher in the native forest, you might spot the ‘apapane, a bright red honeycreeper, or the ‘i’iwi with its curved orange-red bill. ‘Ohi’a lehua trees, known for their red pom-pom flowers, dominate the canopy.

Feral goats, game birds like the Erckel’s francolin and black-tailed deer also live in the canyon.

The park is working to address Rapid ‘Ohi’a Death, a fungal disease that has killed hundreds of thousands of these trees across the islands.

Koke’e State Park sits in cool rain forest above

Keep driving north past the canyon and you enter Koke’e State Park, 4,345 acres of mountainous terrain at roughly 4,000 feet.

The air cools fast, and the exposed canyon gives way to dense native rain forest thick with ‘ohi’a and koa.

The Koke’e Natural History Museum, a small nonprofit, has exhibits on geology and native birds and hands out trail maps with current conditions.

More than 20 trails wind through the park, from short nature walks to strenuous backcountry routes. Temperatures here can drop into the 50s while the coast sits in the 80s, so bring a layer.

Kalalau Lookout reveals the Na Pali cliffs from above

The Kalalau Lookout near mile marker 18 sits at about 4,000 feet, and on a clear day the view stops you cold. Kalalau Valley opens below, a deep green amphitheater with fluted cliffs dropping toward the Pacific.

At the very end of the road, the Pu’u o Kila Lookout centers you between the ridges overlooking the valley and the Na Pali Coast.

Fog rolls in fast at this elevation and can cut visibility to near zero in minutes, so come in the morning for your best shot.

These lookouts let you see the Na Pali Coast from above without hiking the 11-mile Kalalau Trail or booking a boat.

The Awa’awapuhi Trail ends at a sheer drop

Starting near mile marker 17, the Awa’awapuhi Trail runs about 6 miles round trip with roughly 1,500 feet of elevation change.

The first 2.5 miles wind through dense native forest before the canopy opens to a narrow ridge.

From there, the Na Pali Coast cliffs fall away on both sides, and you’re looking down into both the Awa’awapuhi and Nualolo Valleys. The return is entirely uphill, so allow 3 to 5 hours.

Rain is common at this elevation, and the trail gets muddy fast, so wear sturdy shoes.

Explore Waimea Canyon State Park on Kaua’i

You can reach the park from Lihu’e in about an hour by taking Highway 50 west to Highway 550 in the town of Waimea. The lookouts and most trails are open daily during daylight hours with no reservations needed.

Non-resident entry costs $5 per person, free for children 3 and under, plus $10 per vehicle. Hawai’i residents enter free with valid ID, and one receipt covers both Waimea Canyon and Koke’e State Parks.

Pay at the self-serve credit card kiosks. Bring water, sunscreen and rain gear, because no food is sold inside the park.

Check the official website before you go for any closures.

This article was created with AI assistance and human editing.

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