Kisatchie National Forest, the only National forest in Louisiana, United States, is located in the forested piney hills and hardwood bottoms of seven central and northern parishes. It is part of the Cenozoic uplands and has large areas of longleaf pine forests. It is one of the largest pieces of natural landscape in Louisiana, with some 604,000 acres (2,440 km2) of public land, more than half of which is vital longleaf pine and flatwoods vegetation. These support many rare plant and animal species. There are also rare habitats, such as hillside seepage bogs and calcareous prairies. The forest also contains and provides a buffer for the Kisatchie Hills Wilderness, a nationally designated wilderness area that contributes to protecting biodiversity of the coastal plain region of the United States.

Grant Parish is a parish located in the North Central portion of the U.S. state of Louisiana. As of the 2020 census, the population was 22,169. The parish seat is Colfax. The parish was founded in 1869 during the Reconstruction era.