Oh Anna, my favorite hike in nearly all the world in on Kauai - the Nualolo and Awa'awapuhi trails - you'd have to get dropped off, or hitch back to your car (not far), as it's not a loop per se. If you can catch a sunny day up at the top of the canyon, it's SO FANTASTIC! (not worth it in the mist, though). The trail head is near the Kokee State Park visitor's area.
OK, how's that for OT!? But I know you like to hike...
http://www.kauaiexplorer.com/h.....i_hike.php
9 miles.
Sorry about your sunburn.