Ferry County is bordered on the north by the
Kootenay Boundary Regional District, British Columbia, Canada, along the 49th parallel; to the west by
Okanogan County along the boundary between ranges 31 and 32 east; to the south by
Lincoln County in the midline of the
Columbia River; and on the east by
Stevens County, again along the Columbia River and then
Kettle River midlines. According to the
United States Census Bureau, the county has a total area of , of which is land and (2.4%) is water. Most of Ferry County is covered by the rugged
Kettle River Range, which extends from the
Canada–US border to its southernmost perimeter bounded by the Columbia River and
Roosevelt Lake. Only a narrow north–south strip running the length of the county on the west between the
Sanpoil River and the
Okanogan County line encompasses part of the
Okanogan Highland. Except for the town of Republic, the county is sparsely populated. The county has three major river systems, with the impounded
Columbia Rivers Franklin D. Roosevelt Lake forming the southern and most of the eastern county boundary. Along the northern border, the Kettle River drops south into the county near the
Midway, British Columbia border crossing, before turning north again at
Curlew to cross into Canada at the
Danville border crossing. It swings south again on the eastern side of the Kettle River Range and passes into the US just east of the
Lauier border crossing and is the northern section of the Ferry-Stevens county Border before joining with the Columbia River north of
Barney's Junction. The southern and south central part of the county from just south of
Curlew Lake is all drained by the south flowing Sanpoil River, which joins Franklin D. Roosevelt Lake at the southern tip of the county south of
Keller. Southwest of Republic in the eastern edge of the Okanogan highlands is a group of four recreational lakes, Swan Lake, Ferry Lake, Fish Lake, and Long Lake in
Colville National Forest land, while the
Lake Roosevelt National Recreation Area is accessible on the eastern edges of the county.
Kettle River Peaks The highest peaks in the county are located along the crest of the Kettle River Range and are part of either the Colville National Forest or the Colville Indian Reservation.
Washington State Route 20 crosses over the Kettle River Range along the southern shoulder of Sherman Peak at
Sherman Pass, which at is highest mountain pass open all year in the state.
Boulder-Deer Creek Pass is a paved two-lane county road and one of several critical secondary roads that provide access into and out of Ferry County. Its eastern terminus is with
U.S. Route 395 south of
Orient, while the western end forms a junction with
State Route 21 at Curlew, and the western continuation of the road is labeled as the West Kettle River Road. Boulder Creek Road is one of three passes crossing the Kettle River Range, and the northern most. In the southern Kettle River Range is
Bridge Creek Pass between
Highway 21 and
Inchelium. The road starts at approximately at Curlew and climbs up to a crest of and then drops back down to about at Highway 395. Crossing the county east to west is the
Pacific Northwest National Scenic Trail, which enters the county along the Boulder pass highway, turns south along the
Kettle Crest National Recreation Trail and turns west again along the 13 mile trail. •
Copper Butte, highest point: • Snow Peak, • Scar Mountain, • Wapaloosie Mountain, • Sherman Peak, • Bald Mountain, • White Mountain, • Columbia Mountain, • Midnight Mountain, • King Mountain, • Edds Mountain, ==Economy==