Great to see another old steam line come back to life! I hope this will be running tourists like the Strasburg railroad. I've seen a few "nonrailroad" people enjoy taking scenic trips and dinner cruises on these old steam lines so it keeps the history alive.
They run a weekend schedule, but steam runs when the volunteer crew are on(which is always subject to change). You can find them on Facebook(or facebroke, whichever you prefer to call) or just Google Black River and Western Railroad. Departures are from Flemington Station for the most part(that is where you could buy tickets if you don't get them online) which is adjacent to Liberty Village(I believe that is still called that). The route runs from Flemington to Ringoes and the trip is roughly 30 minutes. During harvest season they stop off at Pumpkin Junction which is a few minutes from Ringoes to pick pumpkins. They have had a run out to Bowne Station which was an old farmer's market stop on the old Bel Del RR way back when. The Sunset Limited they called that run which I believe they run maybe at the most 3 times in the fall season. I did that in 2019 and it was pretty cool coming back in after dark. I took some great night photos with my new phone(which I still have, Pixel 3). I still have those on this phone.