What to say but I got the beat.  

Cyclemeter says it was 12.93 miles, 1.3 hours. 

Here's the route in Google Maps. 

A picture of the turnaround point. 

Sailboats on the Hudson. 

Hot and humid, but good biking weather. Not too many people on the trail.  

First time I made it as far as 125th. Next stop Yankee Stadium.