A Google search for “Hawaii Hiking Blog” gets you to the #1 site: the Hiking and Backpacking in Hawaii Blog.
A place to read about hiking in Hawaii, backpacking in Hawaii, and trails in Hawaii. Read Hawaii hiking stories, Hawaii hiking information, information about Hawaii trail locations and conditions on the Big Island (Hawaii island), Maui, Oahu, Kauai, Molokai, and Lanai. Find out about the beauty of the Hawaiian Islands.
It’s good. I’ve just started working backwards through the many posts, looking for the the best hikes in Hawaii.
Dayle, the site editor, has great knowledge of the islands. He and his wife Jacqueline lead hikes for the Hawaiian Trail and Mountain Club (HTMC).
Of the best hikes in Kauai specifically, Dayle says most people name Kalalau and Awawapuhi-Nualolo.
He posted another GREAT hike on that island that appeals to me:
Photo credits: http://www.ne.jp/asahi/fu-kei
A lesser used trail but one that is equally fantastic is the Honopu Ridge Trail located in the Kokee area of Kauai. …
Along with my wife Jacque, I did this a few years ago and the payoffs at the end were fantastic views of the Na Pali Coast far below plus some awesome ridge hiking on some thrilling sections of trail. A very interesting and unexpected finding at the end of the trail are benches and lounge chairs made of sticks and slats of wood that have been lashed together. If you are like me, you’ll be amazed to find something like those manmade benches there.
This area is the domain of mountain goats (literally). Very likely, if you hike the Honopu Ridge trail you will encounter, or at least hear, these horned denizens of the cliffs. …
If you are looking for an adventure off the well-trampled paths used by most tourists, then Honopu Ridge is for you.
Of course I have subscribed by RSS feed.
besthike.com 
Since you’re heading to Kauai, you’ve motivated me to post my four Hawaii hikes to my site. Three of them are on Kauai. Expect to see them next week, once I’ve finished polishing them off.
Thanks Stuart.
I am SERIOUSLY looking at going myself, last 2wks of March.
: )
You really should – you’d love it! We only spent 4-5 days but managed to get three hikes in all the same. Haven’t done the full Na Pali trail though, which I imagine you might be toying with.
Absolutely.
Looking at all hikes on all the islands right now.
The first one’s up:
http://www.trailspotting.com/2008/02/kauai-swamp-trail.html
This is the coupling of the Pihea Trail and the Alaka’i Swamp Trail, which was our favorite hike on Kauai.
We didn’t do the full 22 mile Na Pali trail, so we can’t compare the two and say which we think is the best, but then they’re entirely different hikes anyway.
We did walk some of the Na Pali trail on the popular Hanakapi’ai Falls hike, and I’ll be posting my piece on that in the next few days.