Path is still there I used it to walk to SSR but if you kept going I think it would lead to the parking lot over by the house of blue in dtd. So long as it is light out it is fine. I wouldn't walk it at night the path is not lit.
It is 0.93 miles from the pathway behind Bldg 55 to Cirque. The walkway is not lighted and is 'technically' closed after dark but is a nice walk aling the Trumbo Canal. We've seen golden eagles and river otter while walking that path over the years.