Discover your perfect balance at The ISO by Castle
Kapaʻa, Hotel
In the Greek language, iso translates to equal. Yet, you'll quickly grasp that The ISO is unequalled in embracing the adventure, romance and culture of Hawaiʻʻi's - Island of Discovery.
Located in the seaside town of Kapaʻa on Kauaʻi's east coast, this new boutique hotel encompasses all of the best things about the Garden Isle. From charming, newly-renovated guest rooms to a variety of on-site activities and amenities, The ISO offers an experience you can carry with you forever. Show full description
Amenities, services and location further elevate the options for those craving diversions best experienced by allowing the day to roll out in a natural way.
Jumpstart your energy flow with oceanfront yoga as the sun rises from the Pacific. SUP into Kauaʻi's lush interior along Wailua River, park your board and hike to 120-foot Secret Falls. Or cruise with a dolphin pod escort along the dramatic Nāpali Coast.
After exploring this enchanting island, return home to replay your day with our ISOtini cocktail, dinner and live music at The ISO's legendary Bull Shed Restaurant.
New lifestyle touches include bell/valet team, 24-hour front desk, WiFi, courtyard fitness sessions, bicycles, yoga mat use, BPA-free plastic water bottles with water refill station, and daily breakfast of fresh fruits, yogurt and granola.
Centrally located in Kapaʻa, The ISO is the perfect home base for springing into boundless natural wonders, recreation, activities, and culture that define Kauaʻi's heart.
After a day on the go, stay “at home” with specialties like grilled shrimp, seared ahi, and garlic tenderloin at The ISO’s oceanfront Bull Shed Restaurant. This 40-year island tradition offers happy hour and dinner service daily.
Convenient dining and shopping options line Kūhiō Highway, with Waipouli Town Center just across the street.
4-796 Kūhiō Hwy Kapaʻa, Kaua'i HI 96746
Airport Transportation: SpeediShuttle offers comfortable and reliable transportation to and from the airport. Just sit back and enjoy the ride. Make your reservation today.
Kauai is known as “The Garden Isle” and is the perfect destination for true nature lovers. Enjoy the natural beauty from a Helicopter, Zipline, Kayak or Sailboat. Check out more activities and attractions..
Recently refreshed rooms are tech-ready and feature rustic-chic island decor, The ISO's contemporary hotel rooms and one-bedroom suites are geared to active travelers who appreciate style, comfort and convenience. All accommodations are non-smoking and feature a private ocean view lanai for soaking in east Kauaʻi's beautiful scenery and mellow vibe.
If you find a lower rate on any third party Internet travel site, we will match that rate, and more.