Trout populations in the Big Hole river increased slightly after hitting historic lows last year, according to preliminary estimates released by Montana Fish Wildlife and Parks.
Estimates from FWP were completed for sections in the middle stretch of the river. Rainbow trout numbers counted by researchers increased by about one percent. Brown trout numbers doubled from 2023’s lows. However, both populations are still well below historic averages.
FWP reports a good water year in 2023 explained the population growth, as it resulted in increased survival rates for juvenile fish.
Scientists with FWP and Montana State University are working on a mortality study this summer, hoping to identify causes behind a population crash affecting trout in the Jefferson basin.
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Briefs: The lower Big Hole River is under a full fishing closure due to drought and heat; Jefferson County Commissioners have appointed a new legislator to an open seat. Montana State University says it will continue providing Native American cultural programs thanks to a renewed $2.4 million grant. -
A new report indicates the Jefferson River basin might be in trouble. The nonprofits behind the study hope it will spur change. -
Briefs: Polson medical center expansion will double primary care services; Montana launches teacher apprenticeship program; Public comment opens on proposed BLM oil and gas leases; FWP urges anglers to kill and report brown trout caught on the Flathead River.
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Widespread algae blooms are emerging across southwest Montana’s waterways. And, Fishing restrictions hit Southwest Montana.
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The Milk River Project provides drinking and irrigation water to thousands of people along the Hi-Line. After a catastrophic failure in 2024, managers say irrigation will soon be restored in part. And, a lawsuit filed by conservation groups alleges water quality violations in Big Hole River management.
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State biologists have been tagging trout across southwest Montana to better understand the population’s health after years of declines. They report encouraging signs, but populations are still below average due in large part to an extended drought.
