PATH - People's Advocacy for Trails Hawaii
Mission: To safely connect the people and places on Hawaii Island with pathways and bikeways.
For a list of Island rides, try the PATH Big Island Riding Guide

Hawaii-ebook.com
Guide to Cycling and Mountain Biking on the Big Island.
BikeHawaii.com
Guide to biking trails on all the Hawaiian Islands:
Hawaii Cycling Club
Hawaii's premier amateur road, mountain and multisport (duathlon/triathlon) cycling and community sports organizations.
Kona Triathlon Experience
Training vacations for triathletes.