I have long been extoling the Green River approach to Gannett, but no one seems to notice! It is the shortest (35 miles round-trip, 17-1/2 each way), and involves a total el. gain of only 6800 ft (up & down, all gains considered). It is also possibly the least technical route with few objective hazards. It is a lovely with beautiful lakes & waterfalls. It is being used by no one. I climbed this route in 1989, and I thought it was easier that the std. approach through Titcomb Basin (which I did 5 years earlier).
OK - on the down side it involves a crossing of the Green River, which could be difficult at high water in the early season (but no problem in August). There are no maintained trails for the last 6 miles, and the bushwack up Tourist Creek is really hard for about 1 mile. But ohe final 200 ft below the summit involves a moderate rock climb. We never took the rope off our shoulder.
A complete description of this route is given on page 29 of the Newsletter, 2nd Quarter, 2002. If you want further information drop me an email.