http://running.competitor.com/2014/05/shoes-and-gear/light-fast-free-2014-summer-trail-running-shoe-buyers-guide_103351
Excellent (though lightweight!) guide to some lightweight trail running shoes.
My next line of inquiry is do the heavier shoes hurt my ankle more? I had a lot of success taking my light-weight road shoes to Morocco in December. Things went badly when running with heavier normal running shoes later that month.
