My social experiment with two friends that I've backpacked with in the past (varying from four times with one, once with the other, and previously little acquainted) was sorely put to the test on the off-trail path from near Lake Nelson to the Sunrise High Sierra Campsite. I gather from my reading here that there is a route that connects Matthes Lake and the Echo Creek canyon west of Nelson Lake (certainly looked impassable from our p.o.v.), but I did not find any indication of a trail per se, but in fact we had to tree-bash our way for some two or three miles (felt like five) from near Nelson Lake to connect to the Cathedral Creek trail. But I would certainly welcome any comment 'advising' me of my failure to find and follow the right pathway or trail - and hopefully illuminate the way for others attempting this route - hopefully with means-tested friends.
We made pretty good time starting just past noon from the Elizabeth Lake TH, even with a nice Greek lunch at E.L., and were following a good use trail down the canyon to where it opens up widely, when the trail literally went cold onto a rocky ridge. The mozzies were already thick enough to persuade us that the extra mile to Nelson Lake would not be so pleasant, so we pitched a camp near the creek. In the a.m., we thought we'd pick up the use trail again by wandering vaguely downhill and slightly switchbacking, but gravity seemed to outweigh the challenge of tree-bashing uphill and west more than south, where I vaguely thought we needed to be heading. We had a Tom Harrison map, some printouts from Google Earth and Google terrain view, and two USGS maps - but little agreement on what was what. And not helped when the USGS map went walkies.
Eventually, we came out of the Echo Creek valley, and no more tall rocky domes or walls on our west, so we got across Cathedral Creek and found the trail. After all that wonderful wilderness, the relative civilization (pit toilets, especially) of the Sunrise HSC was tremendously welcome to all of us, but 11 hours on the trail that day, with probably only 30 minutes net of pauses and breaks was seriously crazy. I'm certain it should have been no more than six hours.
After that, two of us spent a (long) day ascending Cloud's Rest (excellent!) (except for the 21st C. annoyance of a malfunctioning digital camera, and no smart phone) and returning to a curiously vacated HSC, before hiking out (with gratuitous swims in Sunrise and later...) to Tenaya Lake. I meant to include a few photos but put them on Panoramio instead - see Andy Why pics along this route ( :-( - no CR!).