Sorry to post up about this again... as some of you pointed out there is no biking allowed on Main st or on Roanoake just north of the traffic circle in Riverhead. There is a bike trail instead along the water which spits you out on Main near the Aquarium. There is a brand new sign which lists how much your fine would be were you to not use the River Trail on your bike. However, there was just a few months ago, a new edition of road bike trails on Long Island which suggests you go through the circle and head north on Roanoake. This might cause some confusion....