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Cooper Gristmill

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The surging Black River provided the power for the Cooper Grist Mill located in Washington Township, Morris County, NJ

Black River Flash™ movie
(warning: large file 21 meg)

The stretch of the Black River on which the Cooper Gristmill is situated is well-suited for the operation of water-powered mills. In the 1760's, Isaiah Younglove began a flour milling operation that lasted until 1788. Over the years, the mill went through several owners, with the present mill being built in 1826 by Nathan Cooper.

Historic Cooper Grist Mill located in Washington Township, Morris County, NJ Visitors to Cooper Gristmill can watch the massive water wheel power shafts and gears that turn 2,000-pound mill stones as the master miller - in period costume - explains the history of the mill and the vibrant community once called Milltown.

Also available are seasonal events and exhibits such as blacksmithing, stone dressing, machine demonstrations and the rare opportunity of seeing both mill stones being run at the same time.

The non-profit Friends of Cooper Gristmill supports and promotes the development of Cooper Gristmill. Extensive information about their activities is available through their site.

Winter Hours
Cooper Gristmill is closed to the public November — March.

Spring Hours

April 4 – June 27, 2015:
Saturdays only, 10 am - 5 pm
Last tour starts at 3:30 pm

Summer Hours
July 1 – August 30, 2015:
Wednesday Saturday, 10 am - 5 pm
Sunday, 12 Noon 5 pm
Last tour starts at 3:30 pm
Closed July 3

Fall Hours
September 5 – October 31, 2015:
Saturday, 10am 5pm
Sunday, 12 Noon 5 pm
Last tour starts at 3:30 pm


$3 Adults
$2 Senior Citizens (age 65 and up)
$1 children (ages 4-16)
FREE for children under age 4

Friends of Fosterfields and Cooper Gristmill member FREE with valid membership card; discounted fees for special events.

Park Features
  • Group Picnic Shelter
  • Historic Site Handicapped Accessible Accommodations
  • Trails
  • Visitors Center Handicapped Accessible Accommodations
  • Closed Nov - March
  • Pets Not Welcome
  • Restrooms Handicapped Accessible Accommodations
  • Cooper Gristmill waterwheel at Black River County Park.
Things To Do
  • Birthday Parties*
  • Commercial Filming*
  • Commercial Photography*
  • Fishing
  • Group Bus Tours*
  • Hiking
  • School Programs*
  • Snowshoeing
  • Special Events*
  • Summer Camp Programs*
  • Visitor Center Exhibits
  • Wedding Ceremonies*
  • Wedding Photography*
  • X-Country Skiing

*Requires permit/advanced scheduling

The Historic Sites of the Morris County Park Commission received an operating support grant from the New Jersey Historical Commission, a division of the Department of State.