While the majority of the preserves are open, ACRES members also protect land that is not open to the public.
Most closed preserves are life estates, where a land donor lives and retains land use rights. Some preserves are closed to protect sensitive areas or natural features, or because trail installation is not possible.
Allen County
Blackford County
| Name | Acreage |
|---|
| Kenneth Goble Nature Preserve | 98 |
Defiance County, Ohio
| Name | Acreage |
|---|
| Preston Island | 23 |
DeKalb County
| Name | Acreage |
|---|
| Claxton Woods | 93 |
| James M. & Patricia D. Barrett Nature Preserve | 140 |
| Sliger Protected Land | 18 |
Elkhart County
Fulton County
Huntington County
| Name | Acreage |
|---|
| Doerman Nature Preserve | 38 |
| Little River Landing | 53 |
| Philip and Jean Ross Preserve | 23 |
| Victory Noll Acres | 107 |
Kosciusko County
Lagrange County
| Name | Acreage |
|---|
| Draper | 32 |
| Grass Lake | 102 |
| Indian River Nature Preserve | 29 |
| Marsh Wren Nature Preserve | 50 |
| Martin Lake Nature Preserve | 5 |
| Quog Lake | 126 |
| Raber | 32 |
Miami County
| Name | Acreage |
|---|
| Walter H. and E. Marie Myers Nature Preserve on Flowers Creek | 157 |
Noble County
| Name | Acreage |
|---|
| Clock Creek | 35 |
| Kate M. Raber and James R. Johnson | 62 |
| Little Lake | 24 |
| Nevin Nature Preserve | 99 |
| Sauga Swamp | 68 |
| Tamarack Nature Preserve | 10 |
Paulding County, Ohio
| Name | Acreage |
|---|
| Black Swamp Audubon Sanctuary | 74 |
| Dunakin Woods | 26 |
St. Joseph County
Steuben County
Wabash County
| Name | Acreage |
|---|
| protected land | 96 |
Wells County
Whitley County
| Name | Acreage |
|---|
| Kessler Nature Preserve | 1 |
| Richey Woods Nature Preserve | 135 |
Williams County, Ohio
| Name | Acreage |
|---|
| Montpelier Woods | 14 |
