The Hill to Hill Bridge is a road crossing of the Lehigh River linking the south and north sides of Bethlehem, Pennsylvania. Completed in 1924, the bridge carries Pennsylvania Route 378 from Wyandotte Street on the city's south side to a series of ramps and viaducts on the north side. It replaced a two-lane covered bridge and eliminated several grade crossings of three railroads on the two banks of the Lehigh River. The Hill to Hill Bridge is located in the Central Bethlehem Historic District, listed on the National Register of Historic Places in 1972, with a Boundary Increase in 1988.