Emerald Lake

We hike to Emerald Lake, 10,080 feet.
 
"Ice measuring 500 feet thick moved across Bear Lake basin between 15,000 and 30,000 years ago.  Originating in the uppermost valley heads, glacial ice eroded high basins, called cirques, and quarried the sheer granite cliffs of Hallet Peak (pictured).  Rock debris from these glaciers formed the ground moraines, or ridges, that surround Emerald Lake."
--Trailhead plaque