Yukon Jack Snowshoe Race Aspen Colorado 1979. The Yukon Jack Snowshoe races took place from the 70’s-80’s usually in Wisconsin Superior to Rice Lake. The race in the slides however is in Aspen Colorado. Some of the slides in the collectionare dated April 1979. I’m listing several lots from this collection. See my other listings. 35mm Film Slides Lot Of 8 Shipped with USPS First Class Package.