Big island seems like the best bet - it has more land area than all the other islands combined.
If you don't mind rain you could ride most of the belt highway. There are also mountain bike
trips some companies run - you'd have to Google them to find out more.
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-=- '05 Jamis Nova -=- '04 Fuji Absolute -=- '94 Trek 820 -=- '77 Schwinn Scrambler 36/36 -=-
Friends don't let friends use brifters.