By the end of this summer, Jackson Lake could be more mud than water.
In past low-water years, buoys that once floated in marinas have ended up on dry land. Elk tracks have been left on marshland usually inundated by water behind the dam, which more than 100 years ago turned a small, glacially carved alpine lake into a reservoir to store water for Idaho irrigators.
The upcoming summer could break a record low water level, set in 1919, when the lake was less than 1% full.