- About.com: Nude Beaches in Hawaii
- Offers insight into nude beaches on the Big Island and Kauai. - Backyard Oahu
- Trail details and access information, pictures, tips, geography, hike narratives, and more for hiking the ridges and valleys of the Waianae and Koolau Mountains on Oahu, Hawaii. - Division of Boating and Ocean Recreation - State of Hawaii Department of Land and Natural Resources
- Making the state's near-shore waters safe for the enjoyment of residents and visitors. - Friends of Haiku Stairs
- Promotes preservation and safe public access for the Haiku Stairs, a unique hike up the Koolau Mountains. - Girl Scout Council of Hawaii
 - Haleakala National Park@
- Hanauma Bay Education Program
- Describes programmes available for schools and community groups, its sea life, geology, and plants, and volunteer opportunities. - Hanauma Bay Nature Park
- One of the more popular recreational swimming, snorkeling and picnicing areas on Oahu. - Hawaii Boaters
- Grassroots effort to correct the rundown conditon of the state-managed small boat harbours of Hawaii. - Hawaii Scuba
- Kona Coast Divers offers volumes of information about diving on the Big Island. Foreign language pages available. - Hawaii Skin Diver Magazine
- Explore the amazing world of spearfishing competition and sport. Highlights from past issues of subscription-based magazine. - Hawaii Volcanoes National Park@
- Find sites about Hawai'i Volcanoes National Park and its fiery Kilauea and Mauna Loa volcanoes.
- Hawaii Youth Sailing Association
 - Hawaii's Botanical and Other Public Gardens
- Information on and links to public gardens in Hawaii, organised by island. Includes location, hours, fees, and special collections. - Hawaiian International Billfish Tournament
 - Hawaiian Islands Humpback Whale NMS
- Protects the North Pacific population of the endangered humpback whale. Provides information on whale watching, marine research, and education. - Hawai`i Geocachers & GPS Enthusiasts
- A friendly, informal group of geocachers in the islands. - HoloHolo Hawai`i Marine & Ocean Sports News
- Includes weather, events, and other information regarding surfing, sailing, fishing, and other aquatic activities. - Hui Wa'a Kaukahi Recreational Kayak Club.
- All skill levels welcome, weekly semi-organised trips. - Kauai Beaches
- Offers a photographic tour of Kauai's beaches. Also includes maps with location descriptions and a localised beach safety guide. - Kayaking in Hawaii
- Links, stories, and books on sea kayaking. - Lanikai Canoe Club
- Information, news, and photo gallery for the club based on the windward side of Oahu, Hawaii. - Lifeguards' Guide to Oahu's Popular Guarded Beaches
- By the Hawaiian Lifeguard Association, with an emphasis on beach and ocean safety. - Maui Kiteboarding Association
- Promoting safe and responsible kitesurfing and protecting beach access for kitesurfers on Maui. - Menehune Marchers Club
- Hawaii Volksmarching club (member AVA and IVV). Information about year-round events, special events, and how to contact the club. - Outrigger Canoe Club
- Works to perpetuate traditional Hawaiian water sport, specifically canoe and board surfing. - Pacific Paddler
- Focuses on outrigger ocean races. - Solo Climb on Mauna Loa
- Journal with photos of a hike to the summit cabin. - Student Hiker
- Pictures and descriptions of trails on Oahu. Hikes done by the hiking club at Chaminade University of Honolulu. - Team Boomerang
- Official site for Sydney 41 racing team from Hawaii. Includes a racing schedule, crew information, and boat photos. - TransPac Yacht Race
- Official site of the biennial transpacific yacht race from Los Angeles to Honolulu. - Troop 311
 - Waikiki Beach Boys Canoe Club
- Outrigger canoe paddling photos, results, and calendar, plus T-shirts and stickers. - Waikoloa Canoe Club
- Nonprofit outrigger canoe organisation. Has divisions for every age group.
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