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Three Sisters Group Site opening date & reservations

Reserve on Recreation.gov

Managed by

USDA Forest Service: Bitterroot National Forest

State

Montana

Opens

—

Closes

Oct 12, 2026

Season notes

Recreation.gov: The day use fee season begins Memorial Day weekend and extends through Labor Day weekend.

Status

Closed for the season

Reservations

Recreation.gov

Booking window

Not listed on source page

Source

Official page (checked 2026-10-17)

Last verified

Oct 18, 2026 against the Recreation.gov availability calendar

Reserve on Recreation.gov

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