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Photo: Ilia2011, CC BY-SA 4.0 via Wikimedia Commons
A 7.64 km active railroad tunnel through the Hoosac Range, an extension of Vermont's Green Mountains. It remains the longest active transportation tunnel east of the Rocky Mountains, the sixth longest railroad tunnel in North America, and a Historic Civil Engineering Landmark since 1975.
The Hoosac Tunnel is a 4.75-mile (7.64 km) active railroad tunnel in western Massachusetts that passes through the Hoosac Range, an extension of Vermont's Green Mountains. It runs in a straight line from its east portal, along the Deerfield River in the town of Florida, to its west portal, in the city of North Adams.
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Year-round 8AM-dusk. With over 50 miles of trails on 1000 acres, several fine ponds, a fifty-foot waterfall and camping in an old apple orchard (see Sleep section below), this is one of the jewels of the Massachusetts park system. Access is free, a $5 fee is charged from mid-May through Columbus Day for parking only at North Pond day-use area and for visitors to the campground. Parking is free for ParksPass holders, vehicles with Handicapped, POW, disabled veteran plates/placard, and seniors 62 and above with the Massachusetts Senior Pass.