HAS BEEN FOUND! Blue and black Outdoor Research bivy sack in black stuff sack. Fell off my pack on the hike out on Aug 15th somewhere between the Gash and the Glacier Gorge trailhead.
Yay!!!! My bivy sack was found and turned in to the lost and found dept in RMNP. Thanks to the hiker who did that! I guess the marmots will have to be content with the leather they chewed off my husband's hiking boots while we were on the climb.