The Upper Owens River is low but flowing healthy and cool.  Deep runs and holes without visible  bottom hold the fish.  Some terrestrial action can be found.  Fish beetles and hoppers, and maybe some bigger ants.  Buggers,  of course,  will always take fish when presented correctly.  Standard Attractor patterns under the water as nymphs will get you Trout most of the day.  Green Caddis Worms,  Princes,  Pheasant Tails, and Robos and the like fished in sizes  #16-20 will take fish.  Sporadic hatches can also be experienced throughout the day.