Kauai Secret Falls Kayak and Hike
4 hours, 30 minutes guided tour to Secret Falls
From $135, Alii Kayaks
Check Availability at Viator
Few adventures on Kauai combine paddling, hiking, river crossings and a spectacular waterfall as completely as the journey to Secret Falls. Officially known as Uluwehi Falls, the waterfall is hidden deep within the lush interior of Kauai and cannot be reached by simply driving to a trailhead. Getting there requires effort.
The adventure begins on the Wailua River, where paddlers travel approximately two miles upstream by kayak before leaving their boats behind and continuing on foot through the tropical forest. The hike follows streams and muddy trails, crosses shallow water and climbs briefly over uneven terrain before arriving at the base of the waterfall.
The entire excursion generally requires four to six hours, depending on paddling speed, trail conditions, crowds and how much time visitors spend at the falls. The combination of river travel and hiking makes the journey one of the most distinctive outdoor experiences on Kauai.
The Journey Begins on the Wailua River
The Wailua River is one of the great natural landmarks of Kauai. Flowing through the island’s eastern side, the broad, tropical waterway passes through a landscape of steep green mountains, dense vegetation and historically significant sites.
For visitors traveling to Secret Falls, the river is not simply part of the scenery. It is the only practical route to the trail.
Most trips begin near the lower Wailua River, where kayaks can be launched from several locations. Visitors can join a guided excursion or rent kayaks and make the journey independently.
Several established outfitters operate along the river and in the Kapaa and Wailua area, including Kayak Kauai, Wailua Kayak Adventures, and Alii Kayaks. Rental procedures vary considerably. Some companies place kayaks near the river or deliver them to the launch area, while others require customers to transport kayaks a short distance to a public boat ramp.
Reservations are strongly recommended, particularly during busy travel periods.
Visitors should also understand the unusual scheduling restrictions governing commercial kayak operations on the Wailua River. Guided commercial kayak tours to Secret Falls generally operate Monday through Friday and are not available on weekends. Saturdays and Sundays are therefore popular days for visitors who want to rent kayaks and make the trip independently.
Before departing, independent paddlers should understand the route, trail location, weather forecast and river conditions. Anyone uncomfortable navigating the river or hiking through potentially muddy and slippery terrain should strongly consider taking a guided tour during the week.
Paddling to the Secret Falls Trail
From the lower Wailua River, paddlers travel approximately two miles upstream toward the landing area for the Secret Falls trail. Most visitors spend about 40 to 60 minutes kayaking each way, although actual travel time varies considerably. Experienced paddlers may complete the distance more quickly. Families, beginners and visitors paddling into strong winds can require considerably longer. The paddle itself is one of the highlights of the experience.
Leaving the busier lower section of the river behind, the surrounding landscape gradually becomes greener and more secluded. Tropical vegetation lines the shoreline, mountains rise beyond the river and long sections of the journey feel remarkably removed from the roads, resorts and communities of Kauai’s eastern shore.
The Wailua River is generally calm, making the trip accessible to people with limited kayaking experience. Nevertheless, the distance should not be underestimated.
Wind can become an important factor, particularly during the return trip. Afternoon trade winds can make paddling considerably more difficult, and visitors who have already completed the hike may find the journey back more physically demanding than expected.
Starting early is usually the best strategy. Morning conditions are often more comfortable, temperatures are cooler and paddlers have more time to complete the adventure without worrying about rental return deadlines.
Kayakers should remain aware of other river traffic, including tour groups and recreational boats. Staying to the side of the river when practical and remaining alert to approaching boats are important parts of safe river travel.
Finding the Landing Area
After approximately two miles of paddling, kayakers reach the landing area for the trail to Secret Falls. The exact appearance of the landing can change with river conditions and water levels. Kayaks are typically pulled onto the bank and secured before visitors continue on foot.
This transition from kayaking to hiking requires some planning. Anything that should remain dry—including phones, cameras, wallets, car keys and electronic equipment—should be placed inside a properly sealed dry bag. Valuables should not be left unattended in the kayak.
Visitors should also remember where they parked their kayak. Numerous kayaks can accumulate near the landing area during busy periods, and similar-looking rental boats can be surprisingly difficult to identify several hours later. Once the kayak is secured, the second half of the adventure begins.
Hiking Through the Forest
The hike to Secret Falls is approximately three-quarters of a mile each way, although route descriptions and tour itineraries sometimes list slightly different distances. Under good conditions, many visitors reach the waterfall in approximately 30 to 45 minutes. After heavy rain, the same hike can take considerably longer.
The trail passes through a beautiful tropical landscape dominated by dense vegetation, streams and towering trees. Much of the route is shaded, providing welcome protection from the tropical sun after the exposed kayak journey. The forest also offers occasional views across the waterways and surrounding river valley. Although the trail is not especially long or steep, conditions make the hike more challenging than the distance suggests. Mud is common.
Kauai receives frequent rainfall, particularly in the mountainous interior, and sections of the trail can become extremely slippery. Tree roots, rocks, standing water and uneven surfaces require constant attention. Trying to keep shoes clean is generally pointless. This is an adventure where visitors should expect to get wet and muddy.
Crossing the Streams
Several water crossings are among the most memorable parts of the hike. Depending on recent rainfall and water levels, hikers may walk through shallow streams where water reaches from ankle depth to considerably higher. One crossing is assisted by a rope stretched across the water. Hikers can hold the rope for additional stability while carefully making their way to the opposite bank.
The crossing is usually manageable under normal conditions, but visitors should move slowly. Rocks beneath the water can be slippery and uneven, and water depth and current strength can change after rainfall.
Unbuckle backpack waist and chest straps before entering deeper or faster-moving water so the pack can be removed quickly if necessary.
Never attempt to cross a stream that appears dangerously high, swift or flooded.
Flash flooding is a serious hazard on Kauai. Rain falling miles away in the mountains can cause streams and rivers to rise unexpectedly, even when conditions near the trail appear relatively calm.
If water levels are rising or conditions appear unsafe, turn around. No waterfall is worth risking a dangerous stream crossing.
The Short Climb Up the Embankment
Another distinctive section of the trail involves a short climb up an embankment. The climb is not particularly long, but the combination of mud, exposed roots and wet ground can make the ascent slippery. Visitors should use available handholds carefully and maintain distance from the person ahead. After heavy rainfall, this portion of the trail can become considerably more difficult.
The embankment is another reason proper footwear is important. Shoes or sandals with good traction can make the difference between an enjoyable adventure and a frustrating struggle through slippery terrain.
Beyond the climb, the trail continues through the forest toward Uluwehi Falls.
The Final Approach to Secret Falls
As hikers move deeper into the valley, the surrounding forest creates an increasing sense of isolation. Sunlight filters through the canopy. Streams move through the vegetation. The sounds of the river are replaced by birds, flowing water and footsteps along the trail. Much of the hike remains shaded, making the journey surprisingly comfortable even on warm days.
Eventually, the sound of falling water begins to emerge from the forest. The waterfall is close. The trail opens into a natural amphitheater surrounded by steep, vegetation-covered walls. Directly ahead is Uluwehi Falls.
Uluwehi Falls
Secret Falls drops from a high cliff into a broad pool surrounded by tropical vegetation and dark volcanic rock.
After several miles of kayaking and hiking, the first view of the waterfall provides an impressive conclusion to the journey.
The appearance of Uluwehi Falls changes dramatically depending on recent rainfall. During wetter periods, a powerful column of water plunges over the cliff and fills the valley with mist. During drier conditions, the waterfall may be considerably thinner.
Visitors typically spend time resting, eating snacks, taking photographs and enjoying the scenery before beginning the return journey.
Swimming conditions vary. The pool contains submerged rocks and uneven surfaces, and falling rocks are possible near waterfalls and steep cliffs. Visitors should remain cautious and avoid standing directly beneath the waterfall, particularly after heavy rain. The water can also be surprisingly cold.
Most visitors remain at Secret Falls for approximately 30 minutes to an hour, although independent paddlers can adjust their schedule according to rental requirements, weather conditions and remaining daylight.
The return trip follows the same route. Visitors hike back through the forest, cross the streams, descend the embankment, retrieve their kayaks and paddle approximately two miles back down the Wailua River. By the time the trip is finished, most participants have traveled approximately four miles by kayak and hiked roughly 1.5 miles.
Guided Tour or Independent Adventure?
Both approaches have advantages.
Guided tours are an excellent choice for first-time visitors, families and anyone unfamiliar with kayaking or the route to Secret Falls. Guides provide paddling instruction, equipment and assistance navigating the river and trail. Many also discuss the natural environment and cultural history of the Wailua River Valley. Most guided excursions require approximately four and a half to five hours.
Independent trips offer considerably more flexibility. Visitors can paddle at their own pace, spend additional time along the river and remain at Secret Falls longer if rental schedules allow. Weekends are especially popular for independent trips because commercial guided kayak tours generally do not operate on Saturdays and Sundays.
Travelers choosing the independent option should be comfortable paddling several miles, navigating the river, locating the trail, crossing streams and making decisions about changing weather conditions.
What to Wear
Choosing the right clothing and footwear can dramatically improve the experience. Wear lightweight, quick-drying clothing over a swimsuit. Avoid cotton clothing whenever possible. Once soaked, cotton dries slowly and can remain uncomfortable for hours.
Secure water shoes, amphibious hiking shoes or closed-toe trail shoes that can become completely wet are the best options. Good traction is essential. Flip-flops are unsuitable for the hike. Loose footwear can be lost during stream crossings, while smooth soles provide little traction on mud and wet rocks. Expect everything below the knees to become wet and muddy.
A lightweight rain jacket can also be useful. Rain showers are common along the Wailua River and in the surrounding mountains.
What to Bring
Visitors should travel as lightly as possible while carrying everything needed for several hours outdoors.
Bring at least one liter of water per person, more during hot weather or for anyone who drinks heavily during physical activity. Pack snacks or a light lunch. Use a waterproof dry bag for phones, cameras, wallets, keys and other valuables. Other useful items include reef-safe sunscreen, insect repellent, a hat, sunglasses with a retention strap, a small towel, basic first-aid supplies and any necessary medications.
Safety Considerations
The Secret Falls kayak and hike is a moderate adventure rather than a casual sightseeing excursion.
Participants should be capable of paddling approximately four miles and walking over muddy, slippery and uneven terrain.
The greatest hazards include changing weather conditions, flash flooding, strong currents, slippery rocks, falls on muddy trails, dehydration, heat exposure and fatigue during the return paddle.
Check the weather forecast before departing. Avoid the trip during periods of heavy rain, flood advisories or hazardous river conditions.
Wear a properly fitted personal flotation device while kayaking.
Do not underestimate the return journey. Visitors must save enough energy, water and time to hike back to the kayaks and paddle approximately two miles to the launch area.
Families should carefully consider the abilities of children participating in the trip.
Older adults and anyone with mobility limitations, balance problems, significant medical conditions or limited swimming ability should evaluate whether the combination of kayaking, stream crossings and slippery terrain is appropriate.
Never rely entirely on a mobile phone for navigation or emergency communication. Cellular service can be inconsistent in remote areas.
When to Go
Morning is generally the best time to begin the journey. Launching early provides cooler temperatures, more time to complete the adventure and a greater margin of safety if the trip takes longer than expected. Early departures may also help visitors reach the waterfall before the busiest tour groups arrive.
Crowds can become substantial during peak travel periods.
Despite the name, Secret Falls is no longer a secret. The waterfall is one of the most popular adventure destinations on Kauai, and numerous guided tours and independent kayakers travel the route. Visitors seeking the quietest possible experience should depart early and avoid the busiest travel periods whenever possible.
Weather is equally important. A dry morning on the coast does not guarantee safe conditions in the mountains. The headwaters of the Wailua River originate in one of the wettest regions of Kauai, and rainfall far inland can affect streams and river conditions downstream.
Always pay attention to changing conditions.
How Difficult Is the Secret Falls Kayak and Hike?
For reasonably active visitors, the journey is best described as moderately challenging. The distances are manageable. The river is generally calm. The trail has relatively little sustained elevation gain.
What makes the adventure difficult is the combination of activities. Participants must kayak approximately two miles, hike through mud, cross streams, negotiate slippery terrain, climb a short embankment, hike back to the river and paddle another two miles to the starting point.
Heat, humidity, rain and wind can significantly increase the difficulty.
Visitors should plan for an active half-day adventure rather than an easy walk to a waterfall.
Is Secret Falls Worth the Effort?
Absolutely—for visitors prepared for the physical demands and unpredictable conditions. The journey to Uluwehi Falls showcases a side of Kauai that cannot be experienced from a scenic overlook or roadside attraction. The adventure begins on one of Hawaii’s most beautiful rivers, continues through a shaded tropical forest and culminates beneath a waterfall hidden deep within the Wailua River Valley.
There is mud. There are stream crossings. There may be rain. The return paddle can be tiring. But these challenges are part of what makes the experience memorable.
Reaching Secret Falls requires participation in the landscape rather than simply observing it. Visitors must paddle the river, walk through the water and follow the trail into the interior of the island. The journey is what makes Secret Falls one of Kauai’s great adventures.
