box-canyon

Box Canyon is a stretch on Henrys Fork, Idaho.

Also called The Box and Henry's Fork - Box Canyon.

It is fishable and launchable.

Island Park Dam downstream to Last Chance. Length is quoted three ways: ~3 mi (Perfect Fly Store, TU 100 Best), 3.5 mi (Island Park Reservations), 4 mi boat-ramp-to-boat-ramp (Henry's Fork Foundation). Three Rivers Ranch says it begins at the Buffalo River junction.

It is upstream of Last Chance.

It is downstream of Upper Henry's Fork.

Sourced from 9 sites.

Sources: bigskyanglers.com, bigskyanglers.com (2), bigskyanglers.com (3), cdn.orvis.com (retrieved 2026-10-20), henrysforkanglers.com, islandparkidaho.com, kenlockwood.tu.org, The Perfect Fly Store (retrieved 2026-10-20), threeriversranch.com (retrieved 2026-10-20), trroutfitters.com and worldcastanglers.com.

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