It might be but images said it was Imogene pass.
I thought that might be the case, your source might have mislabelled it. I was just there on Google earth and the only switchbacks in that area are what they call Black Bear Pass “Steps” just below Black Bear Pass on a different road south of the Imogene road.
Just noted the extreme switchbacks as unique and they stood out when looking at the area. Looks like a much tougher road than Imogene for sure.