Brown trout can harm native trout species, such as bull trout and westslope cutthroat, by outcompeting them for resources and ...

Bull trout are a native fish species in Montana that relies on four essential conditions for survival: clean water, cold temperatures, a complex habitat, and connected fishery. To monitor this ...

Lake trout were discovered in Swan Lake in 1998, and since then, bull trout have shown “considerable decline,” according to FWP’s draft environmental assessment.

FWP estimates adult bull trout numbers by counting the number of redds in eight tributaries to the South Fork of the Flathead — four tributaries to Hungry Horse Reservoir and four to the South ...

An adult male bull trout with spawning characteristics. The orange abdomen and large hook jaw indicate this male is ready to fight for a mate.

A conservationist who has worked protecting bull trout says Glacier National Park is “playing God” with Gunsight Lake, a remote lake at the head of the St. Mary River Valley.

Redds are spawning beds in the gravel that bull trout excavate when they spawn. After they spawn, biologists, simply by wading streams, can count the redds and gauge how well adult fish are doing.

"Considerable challenges remain to recover the bull trout," the Fish and Wildlife Service said in a new assessment.

Montana Further Restricts Bull Trout Fishing, Hoping to Limit Species’ Decline Montana is one of the last states in the country with fishable populations of native bull trout ...

In the waterways of the Malheur National Forest, the invasive brook trout has been outcompeting the native bull trout, which is listed as threatened under the Endangered Species Act.

In response to record-low bull trout spawning nests in the South Fork of the Flathead River and some of its tributaries, the Montana Fish and Wildlife Commission last week adopted ...