Big Oaks National Wildlife Refuge

Big Oaks is a large national wildlife refuge located across multiple counties in southeastern Indiana. The property encompasses different habitat types that support a wide variety of bird and mammal populations.

The land served as a military ammunition testing facility during World War II, with operations ending in 1995. The area transitioned to wildlife refuge status in 2000.

The refuge takes its name from the large oak trees that once dominated this landscape. Visitors can observe historic structures such as Collin's Ford Bridge today, which appears on the National Register of Historic Places.

Visitors must watch a safety video and complete a form before entering due to the presence of hazardous materials in certain areas. It is wise to check ahead about which trails and sections are open to the public.

The refuge holds the largest population of Henslow's sparrow found east of the Mississippi River, a rare bird that inhabits the grassland areas. Birdwatchers consider this sparrow species particularly worth observing.

Location: Ripley County

Location: Jefferson County

Location: Jennings County

Inception: 2000

Website: https://fws.gov/refuge/big_oaks

GPS coordinates: 38.95000,-85.40000

Latest update: December 9, 2025 18:44