Wassaic train station
From Willipedia
A good 1 1/2 hours away from Williams College, great for those traveling to New York. Wassaic is the last New York Metropolitan Transit Authority (MTA) commuter rail station on the Metro-North Harlem Line. Trains on the Harlem line stop at a number of points before arriving at New York's Grand Central Station, including Dover Plains, Brewster, and White Plains.
About half the price of the Amtrak Albany Train Station, but nearly double the driving time spent from Williamstown. The trip from Wassaic to New York should take approximately two hours and ten minutes.
Getting to the Wassaic Train Station
Simple as heck.
Take Rt. 7 South.
Turn right on Rt. 43/Hancock Rd.
Turn left at Rt. 22 either by turning left at Provost, a sketchy one-way dirt road, or make an almost-u-turn at the light.
At some point you'll need to turn left again to stay on Rt. 22.
Stay on Rt. 22. You'll pass over I-90 and pass through a bunch of open-farmland and stuff. Don't worry, you are not lost.
Eventually you'll get to the train station. It will be on your left. Turn left at the light to enter.