Published January 21, 2007 08:44PM

Trumpeter swans taking off from Yellowstone Lake (Photo: NPS/Jim Peaco)
7,733 Feet Elevation of Yellowstone Lake – the nation’s largest high-altitude lake
141 Streams that flow into Yellowstone Lake. The Yellowstone River is the largest inflow and only outflow to the lake.
136 Square miles surface area
110 Miles of shoreline
20 Miles north to south
14 Miles east to west
139 Feet Average depth
390 Feet Maximum depth
640 Vents mapped under Yellowstone Lake