Battle for the Big Hole. The Big Hole River and Jefferson River watershed has seen dramatic declines in trout populations with some areas

Trout numbers at historic lows in Big Hole River

big hole river - Upper Missouri Waterkeeper®

Algae blooms spell trouble for Big Hole River and its trout

Big hole river montana hi-res stock photography and images - Alamy

Fish Populations and A River In Peril — Big Hole River Foundation

Montana PBS: Trout Decline - The Problems & Solutions

Electrofishing: A necessity or a harm to struggling species?

Low trout numbers on Big Hole River have biologists and anglers

Southwest Montana Trout Populations Continue Alarming Declin - Fly

Fish Populations and A River In Peril — Big Hole River Foundation