The Ski Jumping Hill Archive lists this jump in Elberta as having a k-point at 50m and having been operated by the Elberta Mountain WSP.
On Feb. 10&11, 1951, they held the first annual (sic) winter sports festival at the Elberta Mountain Winter Sports Park. The highlight of the weekend was a jump of 97′ from the ski jump by Pudge LaPrarie and Junior Redman of Elberta on a toboggan. They claimed the world toboggan jumping record unless they heard that someone else had out-jumped them. The ski jumping competition was attended by “just about every ski-jumper of known ability” from the lower peninsula. Jumpers competed from The Rochester Ski Club, the KanDaHar Ski Club, the Briar Hill Ski Club, the Kiwanis Ski Club of Iron Mt., and the Elberta Ski Club. Earl Hill and Walter Alexander of the Briar Hill club led the pack with Hill winning with a jump of 151′. They also had toboggan races which were won by Pudge LaPrarie. The high school jumpers competed at Elberta on Saturday and then at Sugar Loaf on Sunday where Roy Price of Elberta, who jumped 133′ on Saturday won the Sugar Loaf contest on Sunday. This from The Benzie County Patriot, Feb. 15, 1951.