The Oliver and Lucy Bonnell Gothic Arch Roofed Barn in Park County, Montana, or simply the Bonnell Barn, is a Gothic-arch barn which was built in 1922. It was listed on the National Register of Historic Places in 2004. It is visible from as far as 15 miles (24 km) away, overlooking the confluence of Falls Creek and the Shields River. It is about 5 miles (8.0 km) southeast of the town Clyde Park. It was deemed notable as "an excellent and rare example" of a Gothic arched-roof barn, the only one in Park County and one of only 10 known in Montana. It has a hay hood.