I will be co-leading a 32-mile ride around Manhattan Island's Greenway with the East Coast Greenway Alliance on August 3, 9:00AM.
In previous years, we've had from 16 - 65 people of all levels of ability. You should be able to maintain a pace of 10-13mph for several hours, though we do stop for lunch.
Details here: http://www.eventbrite.com/e/east-coast-greenways-manhattan-loop-ride-2014-tickets-11041755187
START: East River Greenway entrance @ 60th St. & York Ave. - meet at the lower dog run inside this entrance
FINISH: East River Greenway @ E 34th St. & FDR Drive