People tend to check in during these times:
Watch out for pedestrians jay-walking that are ignored by police who are too busy setting speed traps for cyclists.
Big hill after E100th St!
If you turn at West 103rd and repeat the, "Harlem Hill Loop" then turn and repeat the lower loop by turning at east 72nd, you have a 15km lap.
The loop from 110th street to 59th street is just under 10km.