Interesting to see an additional trail from Lower FIS that cuts over to the top of the Sunshine Double. Hard to read the numbers, but I think it was called Way Back. Wonder why they got rid of it.
I think the one you're looking at on the map is "The Alley" and the way I'm reading the map it looks like it is the same traverse today that drops you off at the top of Snowflake at the top of the T-Bar.