GrimesFarm & Conservation Center

Conservation Center Display Area
Conservation Center Display Area
Conservation Center
Conservation Center On Bike Trail
Conservation Center Library

Conservation Center
Conservation Center Diorama
Conservation Center
Conservation Center

Conservation Center
Conservation Center Educational Programs
Conservation Center

Featured Events
»   Nature Adventures - Hibernation
December 13 - December 13, 2023   10:00 - 11:00 AM
»   Winter Cardinal Needle Felting Workshop
December 13 - December 13, 2023   12:30 - 3:00 PM
»   Christmas Bird Count
December 19, 2023   
»   Brown Bag Bunch - Ty Smedes presents Mongolia - Land of the Nomades
January 17 - January 17, 2024   11:30 AM - 12:30 PM
»   Nature Adventures - Owls
January 31 - January 31, 2024   10:00 - 11:00 AM
»   Shoes and Soup
February 1 - February 1, 2024   5:30 - 7:30 PM
»   Nature Pop-Art
February 13 - February 13, 2024   6:00 - 7:30 PM
»   Nature Adventures - Herpetology
February 21 - February 21, 2024   10:00 - 11:00 AM
»   Brown Bag Bunch - Iowa Bird Rehabilitation
February 29 - February 29, 2024   11:30 AM - 12:30 PM
»   Herbal Soap from Scratch
February 29 - February 29, 2024   6:30 - 9:00 PM
»   Trees To Table Pancake Feed
March 2 - March 2, 2024   7:00 - 10:00 AM
»  more events
The GrimesFarm Conservation Area is located just west of the city limits of Marshalltown. It lies on the west side of Highland Acres Road and on the north side of 233rd Street.When Leonard and Mildred Grimes purchased their farm west of Marshalltown in 1964, they began the work to heal the then existing abuses to the land. Over the years soil erosion has been reduced by planting grasses, using no-till agriculture practices, establishing waterways, constructing terraces, building a farm pond, and planting thousands of trees. Eventually a “poor farm” was transformed into an excellent example of land that is productive, profitable, and beautiful.

Beginning in 1964, the area was used as an outdoor classroom for local 5th or 6th grade students. A day spent in this “classroom” was coordinated by the public school teachers assisted by guest instructors from the Iowa Department of Natural Resources, the Natural Resources Conservation Service, and the Marshall County Conservation Board. Together they have helped the students understand their relationship to soil, air, water, sunlight, and all living things.
In 1992, Leonard and Mildred Grimes began donating parcels of 160 acres of land to the Iowa Natural Heritage Foundation. A reserve life-estate retains use of most of the land and farm income for as long as either of them lives.

Using Resource Enhancement & Protection funds (REAP), grants, and donations from corporations, civic groups, and individuals, a Conservation Center was built at the GrimesFarm in 2003. The center provides support for environmental education, space for natural history exhibits, a classroom for indoor meetings and
activities, and houses the Marshall County Conservation Board administrative offices. Today thousands of students in all grade levels enjoy this outdoor classroom. Displays will continue to evolve over the years.

Hiking trails provide access to the forests, wetlands, prairies, and crop fields. Public interpretive programs are scheduled periodically throughout the year.


Just west of Highland Acres Road between Highway 30 and West Lincoln Way; Marshalltown, Iowa
Map to Conservation Center


Features & Activities:
  • Hiking trails
  • Bicycle trails
  • Observation tower
  • Restrooms
  • Nature center with educational displays
  • Picnicking and picnic shelter
  • Hiking
  • Wildlife and bird watching
  • Cross country skiing and snowshoeing
  • Drinking water and electricity
  • Amphitheater
  • Nature Playscape
  • StoryWalk

Operating Hours & Seasons

Monday - Friday 8:30 a.m. to 3:00 p.m.

Closed Saturday and Sunday


Closed all county holidays