Three photos of people working in streams.

Photo collage above from left to right: Electrofishing on the Ninemile Ranger District, fisheries biologist snorkeling a headwater stream, and a fisheries biologist sampling streambed surface fines.

Fish Passage

The Lolo National Forest is active in inventorying, assessing and eliminating barriers to the movement of fish and other aquatic organisms. Aquatic organisms including fish, reptiles, amphibians, and invertebrates such as snails, mussels and aquatic insects are important to the health, diversity and function of aquatic systems. Fisheries biologists work closely with watershed and engineering specialists, other government agencies and our partners to reduce barriers associated with the forest road and trail system.

Photo of two people standing in the water looking at the net anchored in the water.
Fisheries crew using a stream trap net.