Dorset Mountain is part of the Taconic Range, located in Danby, Vermont. The peak is also noted as #99 in the New England tallest 100 peak list. It's distinguished as being a trailess peak however the bulk of the journey can be made on logging roads, ski mobile roads or well defined trails.
It was believed that the South Peak was actually the tallest feature on Dorset Mountain and old signs still refer to this as Dorset Peak though the actual peak is .5 miles to the North East.
There are several routes to the top and the mountain itself is strewn with logging roads. It should also be noted that mountain is partially hollow because it is a source of some fine Vermont Marble as well as many natural voids and bat caves. The easiest approach to the top is from the South West via the Tower Road Trail Head (N43.28478 W73.04751). Other approaches are more difficult but have some interesting attractions such as a natural bridge when starting from Emerald Lake State Park on the North East side of the Mountain or Route 7 to the east.
Dorset can be reached from either Route 7 in Danby or Route 30 in the town of Dorset, VT. The Tower Road Trail Head is accessed via Route 30 by turning (left from the North or Right from the South) onto Dorset Hollow Road and following the split (Left) to Upper Dorset Hollow Road (or Lower the meet up at the end) and continuing until the road changes name to Tower Road. Upper/Lower/Tower are all unpaved. Parking is located beyond the last house (see waypoint above) on the road to the right but can be found further along if you're in a high clearence 4WD vehicle.
Tower Road construction seems to be working it's way up the Mountain so road improvements and new houses may push the starting Tower Road Trail Head further up the road over time. Please post any changes to the parking area or any access restrictions.
There are a few options based on taste and relative location:
Merck Forest and Farmland Center, Emerald Lake State Park, Rupert Mountain Road, Rupert VT
Dorset RV Park on Route 30 Dorset
Otter Creek Campground on Route 7 Danby
Marble West Inn Bed & Breakfast, Dorset, Vermont
Some links that I found useful:
Dorset Hike Posting
Vermont Day Hike Review
Caving on Dorset
RPI Caving Guide to Dorset