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The ISO

Discover your perfect balance at The ISO
Formerly Castle Mokihana

Where island, sky and ocean meet in sublime harmony

In the Greek language, iso translates to equal. Yet, you'll quickly grasp that The ISO (Formerly Castle Mokihana) is unequalled in embracing the adventure, romance and culture of Hawaii's - Island of Discovery.

Located in the seaside town of Kapaa on Kauai'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

  •   24-hour front desk  icon 24-hour front desk
  •   Bar/Lounge  icon Bar/Lounge
  •   Ocean Front  icon Ocean Front
  •   Continental Breakfast  icon Continental Breakfast
  •  Parking  icon Parking
  •  Picnic area  icon Picnic area
Full list of resort & room amenities

Celebrate Every Day Your Way

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 Kauai'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 Napali 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.

Immerse Yourself Into Kauai's Splendor

Centrally located in Kapaa, The ISO is the perfect home base for springing into boundless natural wonders, recreation, activities, and culture that define Kauai's heart.

  • Enjoy a spirited sampling at Koloa Rum Company
  • Spend the afternoon snorkeling at Lydgate Beach Park
  • Go with the flow in an inner tube with Kauai Backcountry Adventures
  • Hike through a forest of strawberry guava along the Nounou Trail
  • Sharpen your surfing skills off the golden sands of Kealia Beach
  • Dive into a world of chocolate at Steelgrass Farm
  • Play 18 holes fringing the ocean at Wailua Municipal Golf Course

Bull Shed Restaurant (Kauai's Best Steakhouse)

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 Kuhio Highway, with Waipouli Town Center just across the street.

Explore the property

Driving directions from Lihue Airport (LIH)

  • Exit the Lihue Airport and turn right at the first traffic signal onto Kapule Highway/ Highway 51.
  • Continue on Kapule Highway / Highway 51 until it intersects with Kuhio Highway / Highway 56.
  • Drive a little less than 5 miles, turn right onto Kamoa Road (across from McDonalds).
  • Destination will be straight ahead.

View driving directions on Google Maps

Airport Transportation: Speedi Shuttle offers affordable island wide door to door service at a fixed rate, from the airport. Visit the Castle Speedi Shuttle portal and arrange a pickup online.

Guest Rooms & Suites

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 beautiful scenery and mellow vibe.

View all categories and individual rooms

View of Room Looking inEntry to RoomBathroom VanityBathroom ShowerView from LanaiLanai

Hotel Ocean View

  • Room
  • 1 Bath
  • 290 sqft
  • sleeps 3
Nightly Rates Starting From $145* *Excluding Taxes & Fees
Ocean View from RoomView of Room Looking inEntry to RoomBathroom VanityBathroom ShowerView from LanaiLanai

Hotel Ocean Front

  • Room
  • 1 Bath
  • 290 sqft
  • sleeps 3
Nightly Rates Starting From $155* *Excluding Taxes & Fees
Entry to RoomView of Room Looking inBathroom VanityBathroom ShowerView from LanaiLanai

Deluxe Ocean View

  • Deluxe
  • 1 Bath
  • 290 sqft
  • sleeps 4
Nightly Rates Starting From $195* *Excluding Taxes & Fees
Ocean View from RoomView of Room Looking inEntry to RoomBathroom VanityBathroom ShowerView from LanaiLanai

1-Bedroom Ocean View with Kitchenette

  • 1-Bedroom
  • 1 Bath
  • 290 sqft
  • sleeps 2
Nightly Rates Starting From $275* *Excluding Taxes & Fees

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