
Summer 2026: Water Quality Reflection and Forecast for Island Park
Photo of Island Park Reservoir, taken July 31 2026 Summer 2026 is the Henry’s Fork Foundation’s 11th summer monitoring conditions in Island Park Reservoir, and

Photo of Island Park Reservoir, taken July 31 2026 Summer 2026 is the Henry’s Fork Foundation’s 11th summer monitoring conditions in Island Park Reservoir, and

This article was originally published in Island Park News on May 29, 2026 Ice melted on Island Park Reservoir on March 31, 2026—four weeks earlier

Warmer and drier conditions have slowly degraded water quality in Island Park Reservoir over the last 50 years. In the 1970s and 1980s, federal reports

Photo of an ice-free Island Park Reservoir taken on March 31, 2026 On March 31, 2026, with no accompanying commentary, HFF scientist Christina Morrisett stood

“It feels like July!” was a common sentiment shared around the watershed last month. Anglers enjoyed Brown Drakes on the Ranch three weeks earlier than