Escape into Kauai’s lush interior on the Powerline Trail, offering spectacular vistas and an immersive island experience.

Difficulty: Moderate to Difficult
Area: Wailua
Length: 11 miles (one way)
Map: Google Maps
Also see: Powerline Trail (North)

Kauai’s Powerline Trail cuts across 11 miles of the island’s lush interior, from a point near the Keahua Arboretum (south trailhead discussed here) all the way to Princeville (north trailhead). The trail gets its name from the powerlines that traverse much of its route, but its beauty is far beyond what the name suggests. The trail offers a combination of challenging terrain, serene beauty, and jaw-dropping views, making it a favorite for both locals and tourists seeking an off-the-beaten-path adventure.

The south trailhead, about a quarter mile from the arboretum, is a great place to begin your adventure into the wilds of Kauai. The trail is actually an old road used to service the powerlines. After a brief initial climb up the rocky road, the trail reveals its true nature, a trek into the lush heart of Kauai. There is abundant vegetation along the route that occasionally breaks for epic mountain views. The terrain varies throughout the hike, with several climbs and descents, as well as sections where footing may be tricky due to roots, rocks, mud, and puddles. Although the hike can be slippery and challenging, the scenery of Kauai’s vast untamed wilderness is well worth the effort.

One of the highlights of the Powerline Trail is the incredible variety of flora. As you hike, you’ll notice a wide range of plant species, including towering koa trees, ferns, and the vibrant red ohia lehua flowers that are iconic to Hawaii. Birdwatchers will also be in their element, as the trail is home to a variety of native Hawaiian birds.

Just a couple of years ago, the middle part of the trail had become so overgrown that it became almost indistinguishable (and a risk for getting lost in Kauai’s vast interior). Because of the overgrowth, most people who hiked the trail did a couple of miles from either trailhead before turning back. But the trail was recently cleared, opening up the full route for exploration. Now, at least for a while before the vegetation creeps back, it’s more reasonable to hike the entire 11 miles from the south trailhead to the north trailhead or vice versa.

If you’re hiking the entire trail, to us it makes a little more sense to start the hike at the south trailhead, as the north trailhead in Princeville is arguably more convenient for someone to pick you up after the hike. Of course, it’s also possible to hike the entire trial and return to your starting point for a total of 22 miles. We’ve heard of a few people who have done the full out-and-back, but it is not the norm. For most people who do the entire trail, they arrange a drop off and a pickup at the two trailheads.

Since the trail is actually a road (loosely speaking), the trail is conducive for mountain biking. (A mountain bike makes the 22-mile round trip much more reasonable.) You won’t be riding the entire trail, as there are more than a few challenges along the way. But the trail is well-suited for an off-road mountain biking adventure. Also, it’s important to note that the trail is not suitable for vehicles, including off-road vehicles.

The south trailhead for the Powerline Trail is located about a quarter mile past the Keahua Arboretum on Loop Road. Loop Road becomes a dirt road at the arboretum, so it’s best to park at the Keahua Arboretum and walk the quarter mile to the trailhead, which is on the right. While you are in the area, be sure to check out the peaceful Keahua Arboretum with its colorful Rainbow Eucalyptus Trees. Nearby, just before the arboretum, is the Kuilau Ridge Trail, another (somewhat easier) trail that offers immersive views of Kauai’s interior.

Preparing for the Trail

Because of the demanding nature of the trail, it’s important to be physically prepared. It’s also crucial to bring plenty of water, snacks, and appropriate footwear – sturdy hiking boots with good tread are essential for navigating this rugged path. It’s advisable to start the hike early in the day to avoid being caught in the dark. While the Powerline Trail is undoubtedly rewarding, it’s not a hike to be taken lightly, and that means taking the proper precautions before setting off:

Physical Fitness: The Powerline Trail is considered a moderate to difficult hike, so it’s important to be in good physical condition.
Weather Considerations: Kauai’s weather can change quickly, and rain is common on the island, especially in this more mountainous inland area. Be prepared for wet and muddy conditions, and bring a rain jacket or poncho. Likewise, it can also be sunny, hot and humid on the trail, so be prepared with sun protection and plenty of water.
Gear: Wear moisture-wicking clothing and bring proper hiking shoes. A walking stick can be helpful for maintaining balance on uneven terrain.
Navigation: The trail is generally well-marked, but it’s always a good idea to bring a map or GPS device, as some sections can be tricky to navigate.
Safety: Always hike with a partner, and let someone know your planned route and expected return time. Cell phone service may be spotty or non-existent in some areas, so it’s wise to have a backup plan in case of emergencies.

Final Thoughts

For those seeking a challenging adventure with rewarding views, the Powerline Trail starting at the south trailhead near the Keahua Arboretum is an ideal hike. The trail offers a unique opportunity to immerse yourself in the natural beauty of Kauai, from its dense forests to its wide-open vistas. Whether you’re an experienced hiker or someone looking for a new challenge, the Powerline Trail delivers an unforgettable experience that captures the essence of the Garden Isle’s rugged and untamed landscapes.

Just remember to come prepared, respect the environment, and take your time to enjoy the breathtaking surroundings along the way.