- Alexair
 - Kahului - Helicopter tours that provide scenic views beyond what hiking and driving can show. - Aloha Bike Tours
- Kula - Offers downhill bike tours on Maui.
- Aloha Dive Company
- Kailua-Kona - Diving charters and classes for small groups.
- Aloha Island Tours
- Honolulu - Offers a variety of tours around the islands.
- Aloha Kauai Tours
- Lihue - Offers guided snorkel, hiking, and four wheel drive tours.
- Annette's Adventures
- Kaneohe - Travel planning service.
- Atlantis Hawaii
- Lahaina - Board a submarine and see sunken relics, coral reefs, and marine life.
- Barefoot Hawaii: Tom Barefoot's Cashback Tours
- Maui County - Planning holiday and tour activities in Maui for over 20 years.
- Big Island Divers
- Kailua-Kona - Offering dive trips on the Kona Coast.
- Boss Frog's Maui Vacation Network
- Maui County - Includes visitor tips, maps, and information on activities including boat trips, snorkeling, scuba, hikes, drives, and more.
- Catamaran Kahanu
- Kauai County - Offers educational tours of the Na Pali coast.
- Dahana Ranch
- Kamuela - Offers open range horseback day trips.
- Discover Hawaii Tours
- Honolulu - Hawaii-based tour operator who offers group as well as private sightseeing tours to all the Hawaiian Islands including Oahu, Maui, Big Island, and Kauai.
- Dive Makai Charters
- Kailua-Kona - Dive boat charter operation located on the world famous Kona Coast.
- Dolphin Excursion
- Waianae - Personalised wildlife adventures. Dolphin and whale watching tours along the remote west shores of Oahu.
- Dolphin Journeys
- Kailua-Kona - Offers dolphin encounters and excursions as well as retreats on the Kona Coast of the Big Island of Hawaii.
- Ekahi Tours
- Kahului - Provides van tours of Hana, Haleakala Crater, and Kahakuloa Valley, Maui.
- Espirt De Corps Riding Academy
- Kapaa - Offers trail rides, riding lessons, summer day camp, and weddings on horseback, both English and Western styles, on Kauai.
- Fair Wind
- Kailua-Kona - Boat charters for snorkeling, scuba, snuba, sunning and sightseeing.
- Friends Hawaii
- Mililani - Sightseeing and charter excursions.
- Getaway Adventures
- Island of Hawaii County - Biking, hiking, and kayak tours of the Napa Valley and the Big Island of Hawaii.
- Golf Desk, The
- Island of Hawaii County - Offers golfing holidays at Mauna Kea Beach Hotel and Golf Resort on the big island of Hawaii. Packages include five nights accommodation, unlimited golf, and more.
- Green Fire Productions
- Pahoa - Women-only ecotour conducted through ceremonial gatherings, storytelling, and song. Accommodations provided.
- Guides of Maui
- Kahului - Private personalised tour guide service.
- Hawaii Air Tours
- Hilo - Arranges air tours of the Kilauea Volcano lava flow. In Japanese and German.
- Hawaii Forest and Trail
- Island of Hawaii County - Offers guided full and half day interpretive natural history tours.
- Hawaii Music Festivals
- Honolulu - Provides holiday packages, workshops, and competitions for marching band, orchestras, and choir groups.
- Hawaiian Walkways
- Island of Hawaii County - Offers guided hiking and walking eco-tours into the beauty, history, and mystery of the Island of Hawaii.
- Hike Maui
- Maui County - Day treks into rainforests, waterfalls, deep valleys, cloud forests, volcanic craters, mountain ridges, ancient villages, and more.
- Hiking Paradise
- Maui County - Offers a variety of Maui journeys designed to be delights for your senses, enlightenment for your mind, and great for your body.
- Java Ventures
- Honolulu - Offers tours to coffee-producing locations and educational seminars for coffee professionals and aficionados.
- Kamanu
- Kailua-Kona - Sailing snorkel tour on a custom designed catamaran off the Kona Coast of the Big Island of Hawaii.
- Kauai Nature Tours
- Koloa - Offers one-day trips with short hikes led by local guides, to various parts of Kauai. Topics include natural history, cultural history, and human interaction with the natural environment.
- Kayak Kadavu
- Kihei - Specialises in sea kayaking in the Fiji Islands.
- Kayak Kaua'i
- Kauai County - Offering custom one day and multi-day adventure tours including kayaking, hiking, snorkeling, and more.
- Kelea Surf Spa
- Oahu County - Catered to women who desire adventure, fitness, and relaxation. With camps on the north shore of Oahu and Malpais, Costa Rice.
- Kona Sea Sports
- Kailua-Kona - Family friendly custom charters on Hawaii's Kona Coast for sportfishing, SCUBA diving, snorkeling, whale and dolphin watching, or just cruising.
- Lahaina Stables
- Maui County - Beautiful ocean and waterfall views riding the Kipahulu district of Haleakala National Park, Maui, Hawaii.
- Maile Charters
- Kamuela - Offering sailing adventures off the Kona Coast of the Big Island of Hawaii. Sail, scuba dive, fish, snorkel and sightsee on this beautiful sloop.
- Manta Ray Dives of Hawaii
- Kailua-Kona - Scuba diving off the Big Island's Kona Coast from the Rainbow Diver II, "Hawaii's Glass Bottom Dive Boat."
- Maui 4 Play
- Maui County - Dirtbike adventures off the beaten path with local guide for offroad fun on a Honda 650XR.
- Maui Aviators
- Kahului - Aeroplane flight instruction and tours of Maui with a Piper Archer.
- Maui Custom Tours
- Maui County - Provides affordable custom tours for groups of one to six people.
- Maui Hiking Safaris
- Lahaina - Guided hiking tours through the backcountry of Maui, Hawaii.
- Maui Ocean Activities
- Lahaina - Offers lessons and rentals for surfing, windsurfing, kayaking, banana boat rides, waterskiing, and wakeboarding.
- Maui Tours & Transportation
- Kihei - Offering custom day tours and packages including scuba, land, surfing, weddings, and golf, as well as mini-bus charters.
- Mauna Kea Summit Adventures
- Kailua-Kona - Guided stargazing trips from the tops of volcanos.
- Mike Severns Diving
- Kihei - Offering dive trips guided by biologists or naturalists.
- Mokulele Flight Service
- Kailua-Kona - Offers scenic island air tours for viewing the volcano, whale watching, as well as custom charters and rentals.
- Molokai Princess Cruises
- Lahaina - Offers cruise packages with guided tours or rental cars.
- Mountain Riders Bike Tours
- Kahului - 38 mile bike ride from the summit of Haleakala to the sea.
- Na Pali
- Kauai County - Offers Kauai snorkeling, rafting, and sailing activities along the Na Pali Coast, Hawaii.
- Open Eye Tours & Photos
- Makawao - Privately guided off-the-map Hawaiian adventure with an educational and environmental focus.
- Outfitters Kauai
- Kauai County - Features outdoor adventure activities including sea and river kayaking trips, zipline tours, waterfall hikes, Waimea Canyon downhill bicycle tours, and more.
- Paths In Paradise
- Makawao - Offers a variety of day hikes suited for all abilities.
- Plantation Carriages
- Lihue - Clydsedale drawn carriages for all occasions throughout Kauai. Also offers historic and sugarcane tours, as well as weddings.
- Princeville Ranch@
- Princeville
- Rainbow Adventures, Inc.
- Island of Hawaii County - Provides activities and a bed and breakfast to brighten any Hawaiian holiday.
- Ride Maui
- Maui County - Motorcycle tours and rentals. Day and overnight guided tours include bikes, guides, meals, and entertainment.
- Safari Helicopters
- Hilo - Located on both Kauai and the Big Island.
- Sea Quest Rafting Adventure
- Kailua-Kona - Offers small group snorkeling tours of the remote areas of the Kona Coast of Hawaii.
- Snorkel Bob's Cybereef
- Kailua-Kona - Offering online snorkeling reservations for Hawaii (Oahu, Maui, Kaui, Kona). Also sells equipment and provides tips.
- South Pacific Kayaks & Hiking Outfitters
- Kihei - Offers kayak, hiking, diving, and surfing tours.
- Summit Maui
- Maui County - Adventure travel company offering challenging four day hiking holidays on the island of Maui.
- SunLight On Water
- Kailua-Kona - Offers dolphin swimming adventures, including whale watching and night manta ray snorkeling in Kona, Hawaii.
- Swim With Dolphins
- Island of Hawaii County - Romantic dolphin swimming sessions for couples.
- Tee Time Golf Tours
- Maui County - Specialising in Maui.
- Valley Isle Guides
- Maui County - Offers guided tours including sightseeing, snorkeling, fishing, hiking, surfing, and more.
- Volcano Bike Tours
- Island of Hawaii County - Join an amazing guided bicycle tour of the Hawaii Volcanoes National Park on the Big Island of Hawaii. Explore Kilauea Volcano from summit to sea. Volcano Bike Tours provides all the equipment necessary for your adventure.
- Waipio Ridge Stables
- Island of Hawaii County - Offers horseback trail rides with beautiful ocean and waterfall views on the ridge above Waipio Valley on the big island of Hawaii.
- Waipio Valley Wagon Tours
- Island of Hawaii County - Offers mule drawn wagon tours.
- Wild Side Specialty Tours
- Waianae - Private sailing and kayaking charters among the dolphins, humpbacks whales, and turtles of the Makaha coast of Oahu.
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