Wailua River State Park, located along the lush east side of Kauai, is a must-visit for its lovely scenery and many things to do.
Want to chase waterfalls, cruise a river, hike through lush rainforest, or visit a lovely fern-fringed grotto? Head to Wailua River State Park on Kauai’s east side!
One of the best state parks in Kauai you can visit, Wailua River State Park is centered around the namesake river, one of the largest on the island and the fifth longest.
A view of Wailua Fallsin Wailua River State Park
Wailua River has its source up in Mount Waiʻaleʻale, one of the wettest places on the planet. From here it flows down and creates a lush valley on Kauai’s east side en route to the ocean.
A place of great historical importance to the Hawaiians, the Wailua River area is home to many sacred sites.
The river offers lots of opportunities for fun, including boat cruises, kayaking or stand-up paddleboarding, picnicking and more.
In this Wailua River guide, we describe the best things to do in Wailua River State Park, and offer helpful tips for an enjoyable visit.
And if you’re just starting to plan your visit to Kauai, check out the some of the top things to do in Kauai, many of which you absolutely don’t want to miss!
You just can’t miss these things to do in Kauai!
Opaekaa Falls in Wailua River State Park
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Things to Do in Wailua River State Park
Admire Wailua Falls
Wailua Falls is one of the best waterfalls in Kauai! Not only are the falls beautiful to see, they are also easy to access. No hiking required!
Consisting usually of two side by side cascades on the Wailua River, Wailua Falls plunges 80 feet into a large pool in the gorge below.
A rainbow at Wailua Falls
If you visit in the morning on a sunny day, you may be lucky enough to catch a rainbow at the falls!
After exceptionally heavy rainfall, the falls may converge into one giant cascade, or sometimes have a third cascade in addition to the two you normally see.
Also be prepared for the water to be muddy after rain.
Wailua Falls was featured in the opening credits of Fantasy Island, a popular TV show that ran from 1978 to 1984.
You can see Wailua Falls from a roadside overlook right by the parking area. You’ll see them at an angle rather than full on.
Sometimes, overgrown vegetation can prevent you from seeing the falls in their entirety, but it’s still a great view.
Sometimes the view of Wailua Falls is partially obscured by vegetation
Note that Wailua Falls is closed to hiking, and going down the steep and slippery slope to the base of the falls is not advised.
Wailua Falls is a popular stop, and parking is limited to just roadside, so visit early in the day.
If you do arrive when spots are full, be patient and wait a few minutes and one will open up…people usually stay only a few minutes at the overlook to view the falls and snap a few photos.
Parking at Wailua Falls is somewhat limited
To get to Wailua Falls, take State Highway 583, also known as Maalo Road (see map).
Parking and entry are free, and you can see Wailua Falls any time of the day.
>> Book these 5 star rated, highly popular, Kauai Tours now!
View Opaekaʻa Falls
There’s not one but two Kauai waterfalls you can see in Wailua River State Park
ʻŌpaekaʻa Falls, on the ʻŌpaekaʻa Stream, is both wide and tall. It plunges 151 feet into the gorge below, but sadly, you can’t see the plunge pool from the roadside viewpoint.
The setting of Opaekaa Falls is lovely. It is framed by mountains and lots of greenery, and the water looks lovely against the dark basalt rock.
Opaeka’a Falls from the roadside viewpoint
Although you can see Opaekaa Falls full on, it’s from a fair distance. When there is no traffic on the road, you can still hear the waterfall!
Bring a camera with a zoom lens for a close-up shot of this beautiful waterfall.
There is a parking lot at Opaekaa Falls and it’s large enough that you’ll usually be able to find a spot.
Bring a zoom lens for a closer look at Opaeka’a Falls
To get to Opaekaa Falls, take State Highway 580, also known as Kuamoo Road (see map).
Parking and entry are free, and you can see Opaekaa Falls any time of the day. There are picnic tables and restrooms at this roadside stop.
Snap a Photo of the Wailua River from the Overlook
At the same stop where you see Opaeka’a Falls, if you walk a little bit away from the parking area and cross the road, you’ll come to an overlook that offers a great look at the Wailua River.
The tranquil Wailua River
The Wailua River is about 20 miles long. It starts up in Mount Waiʻaleʻale, in the heart of the island, and ends its journey at the eastern shore of Kauai, where it flows into the Pacific Ocean.
The largest and longest navigable river in Kauai, the Wailua River offers lots of opportunities for recreation.
From this overlook, you get a stunning view of the wide Wailua River and the lush valley it creates.
The Wailua River Valley is so lush and green!
It’s a must-stop spot in Wailua River State Park.
There’s no parking right at this overlook but it’s a quick and easy walk from the parking area for Opaekaa Falls. Be careful crossing the busy road, though.
>> Book these 5 star rated, highly popular, Kauai Tours now!
Take a Boat Cruise to the Fern Grotto
The Wailua River is the only river in all of Hawaii where you can take a boat cruise.
So when you visit Wailua River State Park, be sure to avail yourself of this unique opportunity!
Cruise the Wailua River!
Boat cruises generally take you up to the Fern Grotto and back, a two-mile round trip cruise. En route, enjoy the lush vegetation on the banks of the river, and look for birds.
Tours are usually narrated, and you may hear stories about old Hawaii or commentary about local geology, flora, and fauna.
The Fern Grotto is a popular kayaking and boat cruise destination on Kauai. The lush grotto is framed by ferns and other vegetation in a tropical garden setting.
The Fern Grotto is framed by lush vegetation!
Your boat cruise will usually allow for a landing at the bank near the Fern Grotto, from where you can do the short nature walk through the rainforest to the grotto, to see it up close.
Be sure to use bug spray!
The boat cruise has a fee, $30.00 per adult and $15.00 per child at the time of writing. Tours depart from the Wailua River State Park Marina (see map).
This highly-rated tour of Kauai attractions includes a boat cruise on the Wailua River and pick-up and drop-off at select hotels. The tour price includes the cost of the boat ride.
You’ll also visit Waimea Canyon, the Halona Blowhole, and other Kauai sights.
On this tour, you’ll kayak two miles up the river, then hike about one mile through the rainforest to reach Uluwehi Falls, also known as Secret Falls.
Uluwehi Falls plunges 120 feet into a beautiful plunge pool.
Secret Falls with its gorgeous plunge pool!
At the falls, you’ll have time to relax, and take a dip in the plunge pool if you like.
Then you’ll retrace your steps to the trailhead and paddle back two miles to the kayak launch point.
The paddle along the Wailua River offers the opportunity to take in the views of the lush greenery along the banks, and to look for birds.
The hike through the rainforest also offers the opportunity to see local vegetation up close, and it involves stream crossings!
The trail can be quite muddy, especially if you hit it after a period of rain, and the stream crossings can be quite muddy as well. Wear appropriate clothing and footwear!
You can rent a kayak and do this excursion on your own, or you can join a guided tour.
Wailua River State Park is also home to a number of sacred sites (heiau, pu‘uhonua, and birthstones). Heiau are historical Hawaiian places of worship, and pu‘uhonua were sites of refuge.
In pre-contact times, Wailua was one of two royal centers in Kauai, and home to the ali’i nui (high chiefs) and priests.
Today the remains of the sacred sites here serve as important links to the past.
History buffs will want to tour the Wailua complex of heiaus!
The Wailua complex of heiaus has been designated a National Historic Landmark, and history and culture buffs will want to set aside some time to tour them on a visit to the park.
Start at Hikinaakala, near the mouth of the river, and view the sites along Kuamoo Road as you work your way inland (see map).
Please view the sites from designated viewing areas, where you will also find informational signs. Do not step on the rocks or move them!
>> Book these 5-star rated, highly popular, Kauai tours now!
Getting to Wailua River State Park
Wailua River State Park is located along the east shore of Kauai, Hawaii.
Sites in the park are dispersed, so we’ve given information on how to access each site above.
To give you a general idea, here are the driving distances to Opaeka’a Falls, one of the sites inside Wailua River State Park, from various parts of the island:
It makes sense to visit Wailua River State Park on your way from the south shore of Kauai to the north shore or vice versa.
Visiting the Fern Grotto is a popular activity in Wailua River State Park!
Wailua River State Park Hours and Admission Fees
Wailua River State Park is open daily from 7 a.m. until 7.45 p.m.
There is no entrance fee to visit any of the sites in Wailua River State Park.
Are Wailua River State Park Reservations Required?
Reservations are not required to visit Wailua River State Park.
The only state park on Kauai that requires reservations is Haena State Park, which also provides access to Na Pali Coast State Wilderness Park.
The landscape around Wailua Falls is so lush!
The Best Time to Visit Wailua River State Park
You can visit Wailua River State Park year round, but ideally, you’d want to avoid rainy weather, when views can be obscured and trails muddy and slick.
Kauai’s east side tends to receive a lot of rain in the winter months (between November and April, usually), so you may want to plan your visit for the summer months.
Even in the drier months, some rain is inevitable, so check the weather forecast before your visit.
Of course, the flip side is that in the wetter months the waterfalls have a much heavier flow, and the vegetation is very lush and green.
Our vote is still to pick a dry patch to visit, especially if you plan to hike. The trail to Secret Falls can get SUPER muddy after rains.
If you are lucky, Wailua Falls will be full but not muddy!
The Best Kauai Tours
Have you booked these top Kauai guided adventures yet?
Entire Kauai Island Air Tour (super popular, less expensive than a heli tour, large bubble windows for flightseeing!)
Renting a Car in Kauai
The best things to do in Kauai are scattered all over the island.
Public transport options on Kauai aren’t great, so if you want to explore the island beyond your base, you’ll want to book a rental car for your Kauai trip.
We always use Discover Cars to book Kauai car rentals. They search across a variety of rental car companies, both budget and brand, to offer you the best deals, AND they offer free cancellations. Plus, there are no hidden fees.
Not planning to pick up a rental car at Lihue airport? Pre-arrange round trip transfer from the airport to your hotel and back!
This shared shuttle serves hotels or vacation rentals in Princeville, Kahala, Poipu, Kapaa, or Lihue, and then back again. It’s convenient and inexpensive, and saves time and hassle!
Depending on whether you want a vacation rental with more room and the option to cook some of your meals, or you want a resort or hotel experience, and depending on which part of Kauai you want to choose as your base, you have a variety of options.
Since you’ll likely want to base in a couple places on your trip to Kauai, we suggest starting your search for Kauai accommodations by browsing vacation rentals on VRBO.
We have stayed in VRBO rentals in both Poipu and Princeville and find that the choice and quality are generally great.
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