Secret Falls Kauai: Kayak and Hike to Uluwehi Falls
Secret Falls, properly called Uluwehi Falls, is KauaΚ»i’s classic adventure: a 120-foot waterfall you can only reach by kayaking two miles up the Wailua River and then hiking a mile through the jungle. It is the island’s most popular kayak-hike combo, and it earns every bit of its reputation.
This guide covers everything about Secret Falls (Uluwehi Falls): how to get there, guided vs unguided, what the kayak and hike are like, what to bring, safety, and practical tips. If you searched for secret falls uluwehi kauai or secret falls kauai, this is the complete guide in one place.
Secret Falls at a Glance
| Leg of the trip | Distance | The reality |
|---|---|---|
| Uluwehi Falls, Wailua River State Park, east KauaΚ»i | ||
| The paddle | 2 miles each way (4 miles round trip) | Half the trip is paddling |
| The hike | 1 mile each way (2 miles round trip) | A muddy mile to the falls |
| The falls | About 120 feet | Swimming allowed in the base pool |
| Total time | 4-6 hours | A half-day door to door |
| Difficulty | Moderate (paddling + muddy hike) | You need both arms and legs |
| Dogs | Not allowed | Plan for a dog-free day |
The Wailua River: HawaiΚ»i’s Only Navigable River
The Wailua is the only navigable river in HawaiΚ»i, and it was once the center of Hawaiian royalty on KauaΚ»i. Ancient chiefs lived along its banks, and the river valley holds some of the island’s most significant heiau (temples) and sacred sites. As you paddle, you are traveling through a landscape that was the political and spiritual heart of old KauaΚ»i. Guides on the cultural tours point out the heiau on the hillsides and tell the stories; even on an unguided trip, it is worth knowing you are paddling through history, not just scenery.
How the Trip Breaks Down
The Secret Falls adventure has two distinct halves. First, you paddle about two miles up the Wailua River, HawaiΚ»i’s only navigable river, through a jungle corridor that feels prehistoric. Then you beach the kayaks and hike about a mile inland, crossing streams and slogging through mud, to the falls. Two-thirds of the distance is paddling; the hike is where the elevation happens.
The Kayak: 2 Miles Up the Wailua River
You launch from the Wailua River boat ramp area near the junction of highways 56 and 580. The paddle upstream takes 45 minutes to an hour at a relaxed pace. The river is wide, slow, and beginner-friendly; if you can paddle a kayak in a straight line, you can do this. Take the right fork when the river splits. You will pass the Kamokila Hawaiian Village around 1.8 miles up, a replica village that some tours stop at.
The landing is unmistakable: a sandy beach on the right bank crowded with beached kayaks. Pull yours up well above the waterline and note something distinctive about it, because the beach fills with identical rental kayaks while you hike. Grab a walking stick from the pile at the trailhead; you will want it for the mud.
Paddling technique matters less than pacing. The current is gentle but it is against you going up, so settle into a steady rhythm rather than sprinting. Tandem kayaks are the norm; the person in back steers, the person in front sets the pace. If the wind picks up in the afternoon, stay close to the banks where it is sheltered. The downstream return is faster, but the afternoon trade winds can push against you, which is another reason to start early.
Kamokila Hawaiian Village (Optional Stop)
About 1.8 miles up the river, on the left bank, sits Kamokila Hawaiian Village, a replica of an ancient Hawaiian settlement with thatched huts, taro patches, and cultural demonstrations. Some guided tours stop here; unguided paddlers can pull in for a look. It is a worthwhile 20-minute detour if you are interested in the cultural side, and it breaks up the paddle nicely. There is a small entry fee.
The Hike: 1 Mile of Mud and Stream Crossings
The trail starts at the kayak beach and heads inland through tall grass into the forest. It is about a mile each way, mostly flat but relentlessly muddy. There are three stream crossings: the first has a rope strung across to help you balance on slippery rocks, with water up to your knees. The other two are ankle-deep. Wear shoes you do not mind destroying; water shoes or old sneakers beat hiking boots here because everything gets soaked and caked in red mud.
About a mile in, the trail follows a side stream for the last hundred yards, and then the forest opens and there it is: Uluwehi Falls dropping 120 feet into a clear pool. The elevation gain is only about 250 feet, but the mud and the crossings make it feel like more. Take your time, use the walking stick, and watch your footing on the slick rocks.
The mud deserves its own warning. KauaΚ»i’s red dirt turns to slick clay with any moisture, and this trail is wet most of the time. Expect to slide, expect to get dirty, and expect your shoes to never be the same. Gaiters help if you have them. The stream crossings are the trickiest parts: the rocks are algae-slick, the rope helps at the deep one, and the walking stick is essential at all three. Go one at a time, test each step, and do not rush. Nobody has ever regretted taking the crossings slowly.
The Falls and the Swim
Uluwehi Falls is worth every muddy step. The 120-foot cascade drops into a deep, clear pool perfect for swimming. The setting is pure Jurassic Park: towering cliffs draped in vegetation, the roar of the water, and that almost unreal KauaΚ»i green. Swim out to the falls if you are comfortable; the water is cool and refreshing after the hike. Bring a lunch and eat it on the rocks. Most people spend 45 minutes to an hour here before heading back.
Guided Tour or Unguided Rental?
Both work. Guided tours (about 5 hours) include the kayak, a guide who knows the river and trail, cultural commentary, and often lunch. They are the best choice if you have never kayaked, want the cultural context, or prefer not to navigate on your own. Unguided rentals give you the same kayaks and a map for less money and more flexibility; the route is well-marked and hard to get lost on. A double kayak for 5 hours runs around $110 including tax.
Book the earliest slot available. The 7:15 AM rentals get you on the river before the tour groups and the afternoon trade winds, which make the downstream paddle noticeably harder. You will also get the falls with fewer people.
What to Bring
- Water shoes or old sneakers: the single most important item. The trail is mud and stream crossings.
- Swimsuit and towel: wear the suit under your clothes.
- Dry bag: for phone, camera, and lunch. Rentals often include one.
- Water and food: at least a liter per person plus lunch. There is nothing to buy out there.
- Reef-safe sunscreen and bug spray: the jungle has mosquitoes.
- Walking stick: grab one at the trailhead pile.
- Change of clothes: leave in the car. You will be muddy head to toe.
What to Wear (and What Not To)
Dress for mud and water, not for a hike. Quick-dry shorts and a rash guard or old t-shirt are ideal. Your feet need water shoes with grip or old sneakers you are ready to retire; flip-flops will come off in the mud and bare feet will get cut on the rocks. Do not wear anything white, anything new, or anything you care about. The red mud stains permanently. A hat and sunglasses help on the river, where there is no shade. Pack everything you want to keep dry in the dry bag, including a complete change of clothes for the drive home. A small first-aid kit with bandages is smart; the rocks are sharp and slips happen.
Safety: Read This Before You Go
- Do not go during or after heavy rain. Flash floods are the real danger. The streams you cross can rise fast, and the trail becomes treacherous. Check the weather and cancel if in doubt.
- The rocks are slippery. Every stream crossing and half the trail is slick. Go slow, use the rope and the stick.
- No cell reception. Tell someone your plan. Help is a long way off if you get hurt.
- Stay on the trail. The jungle is dense and it is easy to lose the path. The route is well-marked; do not shortcut.
- Do not cliff jump. People do, and people get hurt. The pool has submerged rocks.
For more KauaΚ»i adventures, see our guide to outdoor adventures in Hawaii and Hawaii’s hidden gems.
Combining With Other East KauaΚ»i Sights
Secret Falls pairs well with the rest of the Wailua area. The Fern Grotto, a lava-rock amphitheater draped in ferns, is a short boat tour from the same river area and makes an easy add-on. Wailua Falls, the 80-foot twin falls you can drive to, is ten minutes inland and worth the stop for photos. And OpaekaΚ»a Falls lookout is right off the highway with a view of the Wailua River valley. Do Secret Falls in the morning, then hit the drive-up falls in the afternoon for a full waterfall day.
Video: Kayaking to Secret Falls
Watch the full kayak and hike to Secret Falls, from the Wailua River launch to the waterfall pool.
Frequently Asked Questions
How do you get to Secret Falls Kauai?
Kayak about 2 miles up the Wailua River from the boat ramp, beach the kayak, then hike about 1 mile to Uluwehi Falls. The round trip is 4-6 hours.
Is Secret Falls the same as Uluwehi Falls?
Yes. Uluwehi Falls is the proper Hawaiian name; Secret Falls is the nickname it earned when it was harder to reach. It is not much of a secret anymore, but the name stuck.
Can you do Secret Falls without a tour?
Yes. Unguided kayak rentals are available and the route is well-marked. A double kayak for 5 hours costs around $110. Guided tours add cultural commentary and lunch.
How difficult is the Secret Falls hike?
Moderate. The paddling is easy and the hike is only a mile each way with 250 feet of gain, but the mud and three stream crossings make it slippery. Wear water shoes and use a walking stick.
Can you swim at Secret Falls?
Yes. The pool at the base is deep and clear, perfect for swimming after the hike. Do not cliff jump; there are submerged rocks. The water is cool and refreshing, and most visitors find the swim is the highlight of the whole trip.
When is the best time to go to Secret Falls?
Early morning, year-round. Book the first rental slot to beat the crowds and the afternoon trade winds. Avoid going during or after heavy rain because of flash flood risk and mud.
How much does it cost to kayak to Secret Falls?
Unguided double kayak rentals run about $110 for 5 hours including tax. Guided tours cost more (typically $130-$160 per person) but include the guide, cultural commentary, and often lunch.
Is Secret Falls safe for kids?
Older kids (8 and up) who are comfortable in water generally do fine, especially on guided tours. The stream crossings and mud are the main challenges. Young children and toddlers should skip it.
Secret Falls is the rare adventure that delivers exactly what it promises: a jungle paddle, a muddy hike, and a waterfall swim at the end. Book the early slot, wear shoes you can trash, respect the weather, and KauaΚ»i will give you one of its best days. The combination of river, rainforest, and waterfall in a single half-day outing is unmatched anywhere else in HawaiΚ»i, which is why this trip books out and why the muddy trail stays busy. Go prepared, go early, and enjoy every single minute of it. If KauaΚ»i is on your itinerary, our guide to the best island in Hawaii for first time visitors puts it in context.
