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GrimesFarm and Conservation Center

Admission Fee

FREE admission, classroom and amphitheater can be rented


Center Use Policy - adopted 4-12-2021

GFCC cleaning rental agreement and cleaning


  1. Amphitheater
  2. Bike Trail
  3. Biking
  4. Bird Watching
  5. Cross Country Skiing
  6. Drinking Water
  7. Electricity
  8. Kitchen
  9. Observation Tower
  10. Parking
  11. Photography
  12. Picnic Areas
  13. Picnic Shelters
  14. Picnic Tables
  15. Playground
  16. Restrooms
  17. Shelter Houses
  18. Shelters
  19. Snowshoeing
  20. Water
  21. Wildlife Viewing

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
A black and white map of Grimes Farm and the Conservation Center in Marshalltown.


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


  1. Leonard Grimes Memorial Amphitheater

    View Subfacility
  2. Nature Center

    View Subfacility
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