General
From River Bottoms to Mountaintops
For the first half of my internship, it was unclear if we would get to install the snow monitoring stations. With only three weeks left
Sam Pruitt
November 4, 2026
Water Supply
Water Quality
Island Park Reservoir Outflow Plan (Updated 9/16)
Drone photo taken on September 9, 2026 The Henry’s Fork Drought Management Planning Committee met on Wednesday, September 16 2026 to develop an updated reservoir
Christina Morrisett
September 16, 2026
General
FAQ: Island Park Reservoir Fall 2026 Strategy
This year has brought the Henry’s Fork watershed an extraordinary water-supply challenge. Natural flow is exceptionally low, and Island Park Reservoir is ending the summer
Jasper Davis
September 9, 2026
General
Island Park Reservoir Current Conditions (9/4/26)
Why is Island Park Reservoir getting so low? Simply put, this has been an exceptionally low-water year. There isn’t enough natural flow to meet all
Jasper Davis
September 4, 2026
Water Supply
Following the Snowmelt: From Mountains to Rivers
Eastern Idaho just had its warmest winter on record—and a changing climate may mean more warm winters to come. Warm winters have big implications for
Christina Morrisett
August 21, 2026
Water Supply
(Almost) Snow-less Snow Science
As an MSU undergrad studying snow science, a summer internship might sound unlikely. Fortunately, snow is an invaluable resource year-round out here in the west,
Sam Pruitt
July 16, 2026
Water Quality
July 2026 Water Quality Forecast for Island Park
In early April, when ice melted off Island Park Reservoir one month earlier than usual, scientists at the Henry’s Fork Foundation (HFF) predicted an early
Christina Morrisett
June 29, 2026
Water Quality
Water Supply and Water Quality Predictions for Summer 2026
The photo above captures the unprecedented situation we face at the beginning of April. The photo, of the confluence of Warm River and the Henry’s
Rob Van Kirk
April 10, 2026
Water Quality
Water Year 2025: Everything you wanted to know and a lot more!
Every year since 2017, the Henry’s Fork Foundation Science and Technology Team has produced an annual technical report that documents all of our data collection
Rob Van Kirk
April 1, 2026
Water Supply
Monitoring the Upper Snake Snowpack: Updates from the Field
Hello! My name is Otto Lang, and I am a postdoctoral researcher with Boise State University and the Henry’s Fork Foundation. I’m working alongside Rob
Otto Lang
March 27, 2026
Water Quality
Fish of the Month: Year 11
As it is the afternoon of December 31, I am closing the year with my annual fish-of-the-month blog, this one at the end of my
Rob Van Kirk
December 31, 2025
Water Supply
Winter Flows on the Henry’s Fork: What Anglers Need to Know
The Henry’s Fork Drought Management Planning Committee (DMPC) met on Monday, November 24 to set this winter’s outflow and reservoir-fill strategy for Island Park Reservoir—an
Jamie Powell
November 26, 2025
Water Quality
The River Rundown: Your FAQs from June 2025
“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
Christina Morrisett
July 8, 2025
Water Quality
Henry’s Fork Summer Fishing: Predictions for water supply and water quality in 2025
This time of year, one question is top of mind: what can we expect from the summer fishing season on the Henry’s Fork? Every spring
Rob Van Kirk
April 14, 2025
Water Quality
Behind the Scenes of HFF’s Daily Water Report
What is HFF’s Daily Water Report? After the severe drought of 2016, which resulted in what is still the poorest water quality we have recorded
Rob Van Kirk
March 7, 2025
Water Supply
Island Park Winter Flow in 2025: How did we do?
Looking downstream from Island Park Dam on January 6, 2025 after a fresh snowfall. How did Island Park winter flow shape up in 2025? Winter
Rob Van Kirk
March 7, 2025
General
How Much Snow Does Henry’s Fork Need for Average Streamflow?
And what does “average” mean, anyway? Now that we are about 75% of the way through the snow accumulation season, we have enough information to
Rob Van Kirk
February 21, 2025
Water Quality
Water Year 2024 Technical Report
As most of you know, I started fishing the Harriman Ranch reach of the Henry’s Fork in 1977. I worked for Henry’s Fork Anglers from
Rob Van Kirk
February 10, 2025
Water Supply
Snow to Streamflow: A Story of Decline [Part 2]
Snow to Streamflow: A Story of Decline [Part 2] In snowy regions like the Henry’s Fork, the amount of water held in the snowpack on
Christina Morrisett
January 22, 2025
Water Supply
Snow to Streamflow: A Story of Decline [Part 1]
Henry’s Lake mountains, photo credit Sarah Newcomb Due to warmer growing seasons and denser forests, Henry’s Fork natural streamflow is declining and becoming less predictable.
Christina Morrisett
January 22, 2025
Water Supply
FAQ: Is Outflow from Island Park Dam Higher Than it Used to Be?
Summertime outflow from Island Park Reservoir is lower (not higher) than it was in the “glory days”.
Jamie Powell
September 1, 2024
Water Supply
Mick & Mike Talk Henry’s Fork in the 1980s (VIDEO)
Mick Mickelson and Mike Lawson talk about the 1980s and what prompted the formation of the Henry’s Fork Foundation in 1984.
Jamie Powell
June 26, 2024
Water Supply
For the Asking Angler: Henry’s Fork Water Management 101
Learn about how streamflow is managed, who the key players are, and how water management interacts with your river experience.
Christina Morrisett
March 29, 2024
Water Quality
Rain Vs. Snow [Part 5]
Increasing spring and summer air temperatures have a doubly negative affect on water quality.
Rob Van Kirk
March 8, 2024