A dead trout floats at the edge of the Big Hole River near Dickie Bridge on June 23. The water temperature was 73 degrees.
A dead brown trout washes up on the lower Madison River, found by the Upper Missouri Waterkeeper conservation group during an unexplained fish kill on May 20.
The Big Hole River trickles by at a mere 24 cubic feet per second near Wisdom on June 20.
The trout decline in southwest Montana rivers was startling even before the drought