Buckeye National Scenic Trail Feasibility Study Act of 2021 This bill requires the study of the feasibility of designating the Buckeye Trail as a national scenic trail. The Buckeye Trail is a system of trails creating a loop extending approximately 1,454 miles from Lake Erie to the Ohio River, through the farmland of northwest Ohio, the hills of Appalachia, the Black Hand sandstone cliffs of the Hocking Hills region, and the Bluegrass region of southwest Ohio.