There is a place in Washingtonville: Udderly Fresh Farm, James Kleister, email@example.com . 183 East Main Street, Washingtonville, NY 10992. valid New York State Raw Milk Permit. Liquid raw milk available every day from 4:30 pm - 5:30 pm in any quantity. Not sure what kind of cows the milk is from they seemed to have a couple of different kinds.845.728.6235
You can pick up direct from them and they are about 25 minutes from Beacon.
Check out the milk club down the farmers' market every Sunday. Really good milk and you can also order cream and kefir.