MyHarriman.com has some good info on the Suffern - Bear Mountain Trail, including the following:
This is a classic north-south trail that runs the length of the park (26 miles), from (obviously) Suffern, New York, to Bear Mountain State Park. You can park at either end of the trail; for New York City hikers, you can easily take the bus to Harriman Park. It will discharge you 100 yards from the trailhead at the southern end, and you can catch the train back to the city the following day from the Bear Mountain end.
Attempted this yesterday from Bear Mountain to Suffern.
A few tip for future runners:
- From NYC you can take the train on eitther sides:
- Bear Mountain — MNR from Grand Central to Manitou (Weekends Only) then 3 miles to Bear Mountain
- Suffern — NJ Transit leaves every hour from Suffern to Penn Station (Connecting through Secaucus)
- Going late fall (November) is not recommended. Fallen leaves cover the trail making navigation and foot placement difficult.
- The trail includes a few steep pitches that require a bit of scrambling. I would have preferred going up these rather than down.