They provide: guides.
You must: meet fitness requirements; wear hiking boots, sneakers or trail shoes.
Optional: wearing a swimsuit under your clothing.
You bring: water, sunscreen, insect repellent, camera, hat, rain poncho, towel.
Duration: 2-10 hours.
Guided hiking outfitters: Aloha Kauai Tours (800-452-1113; alohakauaitours.com); Kauai Nature Tours (888-233-8365; kauainaturetours.com); Kayak Kauai (800-437-3507; kayakkauai.com); Princeville Ranch Adventures (888-955-7669; adventureskauai.com).
Other hiking resources: Na Ala Hele, the State of Hawaii Trail and Access Program (hawaiitrails.org); Kauai Group, Sierra Club (hi.sierraclub.org); A Kauai Blog (great-hikes.com/blog).
No one visits Kauai without visiting the dramatic sea-cliff Kalalau Lookout in Kokee State Park or viewing Waimea Canyon. This organized tour takes its time as it runs the 12 miles from cliff to canyon to coast, all downhill on paved roads.
They provide: cruising bikes with wide saddles and hi-rise handlebars.
You must: meet age and weight requirements; wear sturdy, close-toed shoes with tread; dress in layers for various climate zones.
You bring: windbreaker, sunscreen, insect repellent.
Duration: 4 hours.
Downhill bike operator: Outfitters Kauai (888-742-9887; (outfitterskauai.com)
Just when you've started to think you're in pretty good shape, along comes a saddle to prove you wrong. Kauai's dramatic scenery can be counted on to keep you distracted long enough to finish the ride, and some routes are further sweetened with waterfall swims or beachcombing.
They provide: horse, tack and guide.