http://dnr.alaska.gov/parks/maps/turnagainarmguide.pdf shows distances and trail head locations. If there's sufficient interest in one way hiking, we can shuttle back and forth between McCugh and Rainbow trail heads before and after our walk. Accommodating members interested in shorter or longer outing(s) will be a function of the make-up of the crew. Note other options shown on the map at the link above.
If you don't go, you won't be there.