Cascade Azalea - Rhododendron albiflorum var. albiflorum
A common shrub above 3500 feet, especially of the subalpine, where it grows at meadow edges and on open slopes and reaches 6000 feet. Photographed (left and center) on the Naches Peak loop trail on August 3, 2013, and (right) at Narada Falls on July 22, 2014.