This is an unofficial group ride with no official ride leader, but that's pretty much how we do things here in Hawaii. Every Saturday morning starting around 8:15am folks start showing up to ride the Pupukea Trail system. One group usually leave around 8:30am and a later group usually leave around 9am. The group changes in size and composition on a weekly basis.
The Pupukea Trail system is the island favorite. The trails are relatively mellow on the descents and climbs (not all, but most). For beginners looking for something a bit more challenging I usually recommend Pupukea. It has a good mixed of intermediate trails to keep more advanced riders interested as well. To read more about the trails visit the official Trail Directory page:
Meet up starts around 8:15am with late comers usually showing up around 9am. There are usually two groups, a smaller one at 8:30am that doesn't like waiting for folks who are late, and then the late comers group at 9am.
You may park either down near the beach and add a couple of miles to your ride by climbing up Pupukea road or like most folks, park at the trail head. Directions may be found on the Trail Directory page linked up above.
If you're looking for a mellow ride with a mellow group of folks, this may be the ride for you!