Page "H-13 (Michigan county highway)" Paragraph 4

The Forest Highway System was created by the Federal Aid Highway Act of 1921.

An earthen road was present along the route of H-13 by the middle of 1936.

Later that year, the segment along the Alger – Schoolcraft county line was built as a gravel road, and Miners Castle Road was upgraded to gravel as well.

Additional segments were under construction in 1940 in Delta County and south of Wetmore.

During World War II, the gravel surface was downgraded to earth along Miners Castle Road.

The rest of the modern H-13 was paved in 1948 or 1949.