Originally Posted by
dhuey
You could go the north route on Hwy. 340, which eventually becomes Hwy. 30. The car rental maps do what they can to discourage this, but this is not a rough or dangerous road. It is a paved road in good condition the entire way, and the scenery is spectacular. I've ridden this route on a road bike many times, and it's one of my favorite rides in the world. If you can, give yourself time for some brief stops along the way. Including stops, this would take about 90 minutes.
90 minutes? Really? I'm thinking double that if you make stops...
I noticed when we were there in July that they've repaved and widened the road north of Kapalua, including blowing out the sides of the mountains so that there weren't the blind curves, and putting in guardrails. Much needed and appreciated. However, I'm not sure if they go all the way around.
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For a side trip, you might consider Iao Needle. It's close to Kahului. It can be done in an hour and a half.