upper-henrys-fork

Upper Henry's Fork is a stretch on Henrys Fork, Idaho.

Also called Henrys Lake Outlet to Island Park Reservoir.

It is fishable and launchable.

Henrys Lake Outlet / Big Springs downstream to the head of Island Park Reservoir (Mack's Inn, Coffee Pot Rapids, McCrea Bridge). Fishing is closed at and above Big Springs. HFA names this 'Upper Henry's Fork'; Island Park Reservations describes Mack's Inn to Coffee Pot as mostly smaller trout.

It is upstream of Box Canyon.

Sourced from 4 sites.

Sources: Henry's Fork Foundation, henrysforkanglers.com, islandparkidaho.com and The Perfect Fly Store (retrieved 2026-10-20).

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