The Hal W. Adams Bridge, built in 1947, is an historic bridge that carries State Road 51 across the Suwannee River between Lafayette and Suwannee counties, Florida in the United States. Located 3 miles north of Mayo, it was the first suspension bridge built in Florida, and the only one to carry highway traffic. At its opening on July 4, 1947, it was named for Hal W. Adams of Mayo, former county judge of Lafayette County and then longtime circuit judge for the circuit encompassing Lafayette and Suwannee counties.