Seven miles (11 km) of current SR 623, from Gratton southeast to Burkes Garden, was added to the state highway system as State Route 136 in 1930 and 1931. In the 1933 renumbering, SR 136 was renumbered State Route 87; the rest of the road into Bland County was assigned the SR 623 designation when the secondary routes were numbered. In the 1940 renumbering, SR 87 was renumbered State Route 78 to allow State Route 87 to be used for the connection to North Carolina Highway 87. In 1944, the route was transferred to... Read More