Watershed Council Tours Island Park Reservoir

Thank you to all of those who attended this year's annual Henry's Fork Watershed Council tour! Participants toured the Last Chance...

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Thank you to all of those who attended this year’s annual Henry’s Fork Watershed Council tour! Participants toured the Last Chance Wastewater Treatment Plant, Island Park Reservoir, and Island Park Dam. A special thank you to Fremont County, the City of Island Park, Forsgren Associates, Fall River Rural Electric Cooperative, and Fremont-Madison Irrigation District for sharing their knowledge on some great new projects in our watershed–like the DIRTT Plan and Last Chance WWTP upgrades.

Learn more about the Watershed Council here.

Learn more about the DIRTT Plan here.

Learn more about how Island Park Dam works and how it’s managed.

Learn more about Last Chance WWTP here.

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Recent Posts

Recent Posts

Person holding a rainbow trout.

Research and Monitoring

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 and analysis activities for the year. Water and irrigation year 2025 was a very active year for the team, given one of the hottest and driest summers on record, our 11th year of aquatic invertebrate sampling, and the 20th year of monitoring the rainbow trout spawning run in the Buffalo

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 Van Kirk at the HFF, Lejo Flores, Professor in Geosciences at Boise State University, and Sarah Newcomb at Trout Unlimited. Together, we are in the midst of a two-year WaterSMART project funded by the U.S. Bureau of Reclamation to improve predictions of snow water supply across the Upper Snake River

Otto Lang March 27, 2026

2 people in gear taking water samples

Research and Monitoring

Henry’s Fork Aquatic Invertebrate Trends, 2015-2025

To address angler concerns about decreased hatches, particularly at Last Chance and the upper Ranch, and holistically assess ecological function throughout the mainstem Henry’s Fork, we implemented a statistically rigorous, quantitative study of aquatic invertebrates in 2015. This followed implementation of a watershed-wide water-quality monitoring program in 2014 and prompted subsequent expansion of stream gaging. After our 11th year of sampling in 2025, we had a set of 56 independent observations of macroinvertebrates collected at

Rob Van Kirk March 23, 2026

Aquatic Insects

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 11th year of catching a fish in my home waters in each month of the year. To spare you the math, that’s 132 consecutive months of catching a wild trout or whitefish (and in some years I’ve fair-caught suckers and shiners, too) within a three-hour drive of my home in

Rob Van Kirk December 31, 2025