This bill introduces a new income tax credit, the National Scenic Trail conservation credit , to incentivize the preservation and expansion of designated National Scenic Trails. The credit allows taxpayers to claim an amount equal to the fair market value of qualified conservation contributions that include a National Scenic Trail or a portion thereof, along with its defined trail corridor. A National Scenic Trail conservation contribution is defined as a qualified conservation contribution that encompasses a National Scenic Trail, as authorized under the National Trails System Act, and its trail corridor. The trail corridor is generally defined as an area not less than 50 feet wide on each side of the trail, up to a maximum of 2,640 feet wide, with specific exceptions for existing structures or narrower property interests. Fair market value is determined similarly to other conservation contributions, with an emphasis on the highest and best use of the real property. The bill includes provisions to prevent double benefits, stating that no other deduction is allowed for contributions for which this credit is claimed. It also outlines how the credit interacts with other tax credits, distinguishing between business-related and personal credit applications, and allows for a carryforward of unused credit for up to ten years. Furthermore, the Secretary of the Interior, in consultation with the Secretary of the Treasury, is mandated to study the credit's effectiveness in expanding National Scenic Trails and to assess the feasibility of making it refundable or transferable.