 H @-@ 13 is a county @-@ designated highway in the Upper Peninsula of the US state of Michigan that runs north – south for approximately 36 @.@ 2 miles ( 58 @.@ 3 km ) between Nahma Junction in Delta County and the Munising area in Alger County . The highway is also signed as Federal Forest Highway 13 ( FFH @-@ 13 ) , a Federal Forest Highway between Nahma Junction and Wetmore . The roadway runs through rural national forest lands providing access to several campgrounds and parks . The area contains several lakes as well . The Forest Highway System dates back to the 1920s , and an earthen roadway was present along the route of FFH @-@ 13 by the 1930s . It was paved by the late 1940s and added to the county @-@ designated highway system in the 1970s . A section of H @-@ 13 in Alger County originally continued north to Miners Castle , but the roadway designation was truncated in the first decade of the 21st century . 
