国有林
In 1908, the Cascade Forest Reserve was divided into the Oregon National Forest, the Cascade National Forest, the Umpqua National Forest and the Crater National Forest. In 1911, the Santiam National Forest was created from parts of the Oregon National Forest and the Cascade NF. The Deschutes National Forest was created from the portions that drain into the Deschutes River. In 1933, the Santiam National Forest and the Cascade National Forest were combined to form the Willamette National Forest.