Lost small black backpack near Crystal Lakes Trailhead in High Rockies containing a red water bottle, an orange snack bag, and a map.

I lost my small black backpack near the Crystal Lakes Trailhead in the High Rockies. It has several pockets and contains a red water bottle, an orange snack bag, and a map of the area. I realized it was missing about halfway through our hike and retraced my steps, but had no luck finding it. If anyone happens to spot it, I would really appreciate getting it back!