This is at the site of the original 'Widowmaker' hill in Utah. Most people are surprised to learn that there was a motocross track there and that for a time it was on the AMA World Cup tour (or whatever it was called at the time). For some reason, they got Evil Knievel to come do a promotion, and this is him, on a Harley, on a motocross track. This was in 1975, I would say.
For those of you familiar with Salt Lake, check out how much has changed in 35 years. All that open space is houses now, and where this picture was taken is now someone's living room.