beaverhead-river

Beaverhead River is a river in Montana.

It ranks #8 among the 17 waters of Montana in the registry, and is of national prominence.

Also called The Beaverhead and Beaverhead River tailwater.

Fished for trout (inferred from the species listed).

Species: brown trout and rainbow trout.

USGS GNIS record: 779637.

Access points: Clark Canyon Dam.

Confluences: Twin Bridges.

Features: Barretts Diversion Dam.

Barrett's Park (access). It is fishable and launchable. Last floating take-out above the diversion; 'right in front of a low bridge' - hug the left bank in high water (GBV). Also called Barretts Park.

It is upstream of Barretts Diversion Dam.

It is downstream of Grasshopper Creek Access.

Cornell Park (access). It is fishable and launchable. Dillon weir/hand-launch site; take-out of the short evening float from Tash (GBV).

It is upstream of Anderson Road.

It is downstream of Tash.

Grasshopper Creek Access (access). It is fishable and launchable. About ten miles from the dam (GBV). Grasshopper Creek muddies the river in runoff and heavy rain. Also called Grasshopper Creek.

It is upstream of Barrett's Park.

It is downstream of Henneberry Bridge.

Henneberry Bridge (access). It is fishable and launchable. About six miles from the dam; exit point or boat launch with picnic area (GBV).

It is upstream of Grasshopper Creek Access.

It is downstream of High Bridge.

High Bridge (access). It is fishable and launchable. Less than a mile below the dam; easier launch; short wade stretch above and below (GBV).

It is upstream of Henneberry Bridge.

It is downstream of Clark Canyon Dam.

Anderson Road (access). It is fishable and launchable. Small access next to a county bridge; take-out for the 12-14 mile float from Cornell Park (GBV).

It is upstream of Twin Bridges.

It is downstream of Cornell Park.

Poindexter Slough (feature). It is fishable. Spring-creek-like slough near the Tash access, noted for browns (GBV).

Tash (access). It is fishable and launchable. Access near the Highway 278 junction by Poindexter Slough; start of the 'Tash to Trash' float (GBV).

It is upstream of Cornell Park.

It is downstream of Barretts Diversion Dam.

Float: Clark Canyon Dam to Barretts Diversion Dam, from Clark Canyon Dam to Barretts Diversion Dam, 16 miles.

Float: Grasshopper Creek to Barrett's Park, from Grasshopper Creek Access to Barrett's Park.

Float: Tash to Trash, from Tash to Cornell Park, 5 miles.

Float: Cornell Park to Anderson Road, from Cornell Park to Anderson Road.

Sourced from 1 independent fly site.

Sources: glaciertoyellowstone.com, outsidebozeman.com and The Perfect Fly Store (retrieved 2026-10-20).

Access, closures and rules change; check with the state agency before you go.