Mount Frissell

Mount Frissell, 2454 ft, which straddles the border of southwest Massachusetts and northwest Connecticut, is part of the Taconic Range. Frissell's south slopes include the highest point in Connecticut, a popular destination for highpointers.

Frissell's summit and the majority of its slopes are within Massachusetts' Mount Washington State Forest. Its southern slopes are in Salisbury, Connecticut. Here the state line reaches to about 2379 ft. The high-point marker for Connecticut is on the border with Massachusetts at 42.04963°N, -73.48304°W. (The highest mountain summit in Connecticut is Bear Mountain, about 1.3 mi to the east-southeast of Mount Frissell.

Mount Frissell is traversed by the Mount Frissell Trail which connects with the South Taconic Trail to the west and the Appalachian Trail to the east.

The south side of Mount Frissell drains into Riga Lake and South Pond, then into Wachocostinook Brook, Salmon Creek, the Housatonic River, and Long Island Sound. The northwest side drains into Ashley Hill Brook, thence Bash Bish Brook, the Roeliff Jansen Kill, the Hudson River, and Upper New York Bay. The northeast side drains into Sages Ravine, thence into Schenob Brook, the Hubbard Brook, the Housatonic River, and Long Island Sound. Mount Frissell is bordered by Round Mountain to the southeast, Mount Ashley to the north, and Brace Mountain to the west.