How many gallons of water are in Yellowstone lake?

Answer 1

The stats I am finding are not all that accurate, but they're the best I can use, so here goes..

Area: 352 km²

Average depth: 42 m

This gives a volume of 352 * 1000 * 1000 * 42 = 14784,000000 m3

At 264.17 gallons per cubic metre, the answer is 3,905489,280000 gallons

Read that as nearly 4 trillion gallons US. ■

Answer 2

Yellowstone Lake is the largest freshwater lake above 7,000 ft. It is the 24th largest lake in the United States. It has 12,095,264 acre·ft or 3941259034341.73 gallons.