High Quality Content by WIKIPEDIA articles! Gearhart Mountain Wilderness is a wilderness area located within the Fremont National Forest in Lake County and Klamath County, south-central Oregon. This area was established in 1943 as a Wild Area and designated as Wilderness with the Wilderness Act of 1964. In 1984, an additional 4,144 acres (1,677 ha) were added for a total of 22,823 acres (9,236 ha). The Wilderness is entirely within the boundaries of Bly Ranger District.