Big Spring State Forest Picnic Area is a 45-acre (18 ha) Pennsylvania state park in Toboyne Township, Perry County, Pennsylvania in the United States. The park is on Pennsylvania Route 274, 5.5 miles (8.9 km) southwest of New Germantown. Big Spring State Forest Picnic Area is a hiking and picnic area. A partially completed railroad tunnel in Conococheague Mountain is a feature of the park.
The area surrounding Big Spring State Forest Picnic Area is now largely a wild area. This was not the case in the 19th century. One of the first businesses at the foot of Conococheague Mountain was a tannery. This tannery was in operation from the early 19th century until 1860. The tannery was converted into an axe handle factory in 1871. The Perry Lumber Railroad, a narrow gauge railway also operated in the area. It hauled lumber to tanneries, barrel manufacturers and charcoal furnaces.