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GrimesFarm and Conservation Center (Nature Center)

Subfacility of Grimes Farm

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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. Drinking Water
  6. Electricity
  7. Grill
  8. Grilling Area
  9. Hiking
  10. Internet
  11. Parking
  12. Photography
  13. Picnic Areas
  14. Picnic Shelters
  15. Picnic Tables
  16. Playground
  17. Restrooms
  18. Security
  19. Shelter Houses
  20. Shelters
The GrimesFarm and Conservation Center 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.

The Nature Center can be rented for events, please see the Center Policy and Rental Agreement for more information.


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
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