• Home
  • Bela Brook
  • Kimball Pond
  • Kuncanowet Forest
    • Elementary School Trails
    • Stone Farm
  • News
  • About
Menu

Dunbarton Conservation

Welcome
  • Home
  • Bela Brook
  • Kimball Pond
  • Kuncanowet Forest
  • Conservation Easements
    • Elementary School Trails
    • Stone Farm
  • News
  • About

Guided snowshoe hike to Dunbarton's biggest boulder offered Feb 25

February 24, 2017

Noted geologist George Holt has discovered a new record glacial boulder in Dunbarton and will lead a hike to it Saturday, Feb., 25.

Meet and park on the east side of Kimball Pond road at the entrance to the old town gravel pit. This is approx. 0.9 miles south of the Kimball Pond boat ramp and approx. 0.4 miles north of the intersection of Little Lane and Kimball Pond Road.

The hike will be approximately 1.5 miles round trip through the woods without the aid of a trail. Everybody will need snow shoes. Bring water, snacks and warm clothing.

The hike will start at 9 am. We should be out of the woods by 11 or 12.

The boulder's circumference measures approx. 95 feet, which translates to an average diameter of 30 feet.  The maximum height is about 20 feet. 

Using the a horizontal radius of 15 feet and a vertical radius of 10 feet, the approximate ellipsoidal volume is 4/3* pi*15*15*10, which is approximately 9,400 cubic feet.

Assuming that the granitic rock weighs approx. 175 pounds per cubic foot, the boulder weighs approx. 1.65 million pounds, or approx. 825 tons!  Previously measured boulders in Dunbarton weighed in the range of 100 tons.


For more information: Conservation Commission member George Holt, george@naturofm.com.

← It's a big one!Timber harvest underway at Kimball Pond Conservation Area →
Get notices of our hikes & trail days

The 13 Wonders of Dunbarton

The Bela Brook Conservation Area (Grapevine Road)

Kimball Pond Conservation Area (Kimball Pond Road)

Kuncanowet Town Forest and Conservation Area (Holiday Shore Drive)

Winslow Town Forest (Stark Lane) 

Stark Cemetery (Mansion Road)

Hopkinton Everett Flood Control Area (Everett Dam Road)

Long Pond (Long Pond Road)

Purgatory Pond (Purgatory Pond Road)

View from Burnham Hill (Rt. 13)

Rogers and Putney home sites (Robert Rogers Road)

Highest Point in Dunbarton and view from Mills Hill (Rt. 13) 900 feet).

Biggest boulder in Dunbarton (off powerlines on east side of Kimball Pond Rd.)

Geographic Center of New England (Stone Farm, Guinea Rd.)

Get your 13 Wonders Card