On Fri., Mar. 14, 1941, the “Michigan Mirror” column of The Cass City Chronicle said:
Lewiston's toboggan slide, the "baby" of 1941, is growing up fast.
Apparently the toboggan slide was new either that year or in 1940. They don’t mention skiing and I do not know if this slide was located where Sheridan Valley came to be located.
Sheridan Valley was 7 mi northeast of Lewiston on Co 612. It had 7 slopes from 600′ to 1800′ long, 4 rope tows, rentals, instruction and hot lunches. This information from a Consumers Power brochure circa 1959. On Jan. 4, 1968, The Cass City Chronicle printed the AAA Guide to Winter Sports Fun in Michigan listing Sheridan Valley with 8 slopes, Pomalift and 3 tows.