History of King's Highway 104:
King's Highway 104 was a short collector highway linking Grand Valley with Highway 9. It was among the shortest King's Highways ever to exist in Ontario.
Highway 104 had a total length of only 2.8 km. The route was first assumed by the Department of Highways (DHO) as a King's Highway on September 1, 1937,
but it was not called Highway 104 initially. It is believed that this route was originally known as Highway 9A, but this has not been officially confirmed.
The route was apparently redesignated as Highway 104 in 1947. The highway was paved in 1944, three years before the route number was changed. In 1974, the
entire route of Highway 104 was swallowed up when Highway 25 was extended north from Highway 24 to Highway 89. The route was redesignated as Highway 25,
permanently erasing Highway 104 from the provincial highway system.
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