Bitterroot National Forest is located spanning Montana and Idaho, encompassing 1,594,579 acres. Established in 1898, the nearest city is Missoula, MT. The forest offers 24 campgrounds and 16 other recreation facilities for visitors. Notable campgrounds include Horse Heaven Cabin, Magruder Rangers House, Three Sisters Group Site (Mt), Spring Gulch, Twogood Cabin, and many more.