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

Photo of confluence of Warm River and Henry's Fork

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 Fork, was taken on February 7 and shows the shocking lack of snow we experienced in the watershed all winter as a result of record-breaking warm temperatures. How will the warm winter and lack of snow affect water supply, water quantity, and fisheries? The highlights are below. If you want

Rob Van Kirk April 10, 2026

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

Frequently Asked Questions

Q&A: Are We Seeing Fewer Bugs?

Are aquatic insects actually declining? Not in the way many anglers might think. After 11 years of data collected across six sites on the Henry’s Fork, we’re seeing that overall invertebrate communities remain abundant, diverse, and comparable—or better—than other top western trout streams. In fact, key indicators show improving water quality and habitat conditions over time. So why do hatches sometimes feel worse—especially at Last Chance? The short answer: it’s not just about insect

Jamie Powell March 30, 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