Start with the The Kauai 50 Ultra Race and end with so much more. Here's just a taste.
Sightseeing - The beautiful and acclaimed Na Pali coastline spans 17 miles alongside Kauai north shore and this must-see can be viewed by Helicopter or Boat.
Hiking - You can explore the island on foot and coming across a waterfall and a beach all in one hike is typical, if you want to see a casual 300 ft. waterfall you can do the Hanakapi'ai Falls trail.
ATV Jungle Tours - You can ride ATVs through the jungle and understand why they filmed Jurassic Park on Kauai.
Beaches/ Surfing - There are 28 beaches on Kauai and every one of them is spectacular. If you like big waves some of the world's best surfers like Laird Hamilton and Andy Irons surf the north shore of Kauai near Hanalei beach.
The Coco Palms Resort - You can visit this hotel on the North Shore of Kauai that was frequented in the 1960's by many celebrity guests including Elvis and Frank Sinatra. It was also where the wedding scene from Elvis' Blue Hawaii was filmed in 1961.