Oahu.

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Anybody from Oahu here? i'm going to be in waikiki from the 9th to the 14th of december and i need to keep up with my training while i'm there.anybody wants to show me some rides out there? i need to be doing two kinds of rides while I'm there, a fairly flat and a very hilly ride from 3 to 4 hours in duration each . how about some suggestion on where to ride of who to contact.TIA

Lived on Oahu, but sorry this was before cycling. All I can say is not a whole lot of flat riding there. You'll get a lot good climbs though on the north end of the island.

Perhaps you may want to contact them: http://www.bikeshophawaii.com/
THey've been in business for 34yrs. They could be pretty useful since the island is not really big.