Valley County is a rural county located in the U.S. state of Idaho. As of the 2020 census, the population was 11,746. The county seat is Cascade, and the largest city is McCall. Established in 1917, it was named after the Long Valley of the North Fork of the Payette River, which extends over 30 miles (50 km) from Payette Lake at McCall south to Cascade to Round Valley. The valley was formerly a summer pasture for livestock from the Boise Valley. Since the completion of the Cascade Dam in 1948, much of the northern valley has been covered by the Cascade Reservoir.
Boise County is a rural mountain county in the U.S. state of Idaho. As of the 2020 United States Census, the population was 7,610. The county seat is historic Idaho City, which is connected through a series of paved and unpaved roads to Lowman, Centerville, Placerville, Pioneerville, Star Ranch, Crouch, Garden Valley, and Horseshoe Bend.
New Meadows is a rural city in Adams County, Idaho, United States, at the southern and upper end of the Meadows Valley, on the Little Salmon River. Located in the west central part of the state, just south of the 45th parallel, the population was 496 at the 2010 census, down from 533 in 2000. New Meadows is located at the junction of the primary north–south highway in the state, U.S. Route 95, and State Highway 55, which connects it with McCall and Boise.
Horseshoe Bend is the largest city in rural Boise County, in the southwestern part of the U.S. state of Idaho. Its population of 707 at the 2010 census was the largest in the county, though down from 770 in 2000.
Donnelly is a city in rural Valley County, Idaho, United States. The population was 152 at the 2010 census.
The Boise–Nampa, Idaho Metropolitan Statistical Area (MSA) is an area that encompasses Ada, Boise, Canyon, Gem, and Owyhee counties in southwestern Idaho, anchored by the cities of Boise and Nampa. It is the main component of the wider Boise–Mountain Home–Ontario, ID–OR Combined Statistical Area, which adds Elmore and Payette counties in Idaho and Malheur County, Oregon. It is the state's largest officially designated metropolitan area and includes Idaho's three largest cities: Boise, Nampa, and Meridian. Nearly 40 percent of Idaho's total population lives in the area.
Southwestern Idaho is a geographical term for the area along the U.S. state of Idaho's borders with Oregon and Nevada. It includes the populous areas of the Boise metropolitan area and Treasure Valley.
Interstate 84 (I-84) in the U.S. state of Idaho is a major Interstate Highway that traverses the state from the Oregon state line in the northwest to Utah state line in the southeast. It primarily follows the Snake River across a plain that includes the cities of Boise, Mountain Home, and Twin Falls. The highway is one of the busiest in Idaho and is designated as the Vietnam Veterans Memorial Highway.
State Highway 16 (SH-16) in Idaho is a 16-mile (26 km) route, connecting Emmett with US-20/US-26 and Star.
State Highway 44 (SH-44) is a 23.089-mile-long (37.158 km) state highway in the U.S. State of Idaho. SH-44 travels through the Treasure Valley from Interstate 84 (I-84) to U.S. Route 20 (US-20) and US-26 in Garden City, Idaho.
State Highway 69 (SH-69) is a short 8.012-mile-long (12.894 km) state highway in the U.S. state of Idaho. It runs from Kuna to Interstate 84 (I-84) in Meridian.
State Highway 52 (SH-52) is a 54.126-mile-long (87.107 km) state highway in the U.S. state of Idaho that travels along the Payette River from the Oregon State Line and Snake River to Horseshoe Bend.
U.S. Route 30 (US 30) runs northwest–southeast across the southern half of lower Idaho for 455.481 miles (733.026 km). US 30 enters the state from Oregon across the Snake River in Fruitland and exits into Wyoming east of Dingle. US 26 runs through the large population centers of Boise, Twin Falls, and Pocatello, as well as a plethora of smaller communities from Fruitland to Montpelier. The Thousand Springs Scenic Byway is a picturesque section of US 30 in southern Idaho between the towns of Bliss and Buhl, dipping down into the Hagerman Valley and a canyon of the Snake River.
State Highway 75 is a two-lane highway in the western United States that travels through the Sawtooth Valley of central Idaho. The highway's southern terminus is in Shoshone, and its northern is near Challis. It is designated as one of Idaho's scenic byways and provides access to Sawtooth National Recreation Area and primarily follows the Big Wood River in the south and the main Salmon River in the north, divided by Galena Summit.
In the U.S. state of Idaho, U.S. Route 95 (US-95) is a north–south highway near the western border of the state, stretching from Oregon to British Columbia for over 538 miles (866 km); it was earlier known in the state as the North and South Highway.
Spring Valley Summit is a mountain pass in the western United States in southwestern Idaho, at an elevation of 4,242 feet (1,293 m) above sea level. North of the city of Boise, it is traversed by State Highway 55, the Payette River Scenic Byway.
State Highway 21 (SH-21), also known as the Ponderosa Pine Scenic Byway, is a state highway in Idaho. It runs from Boise to Stanley, primarily as a two-lane road. With two-thirds of its length in Boise County, it passes by historic Idaho City and the village of Lowman to the western edge of the Sawtooth Mountains, then along their northern boundary to Stanley.
Smiths Ferry is a census-designated place in Valley County, Idaho, United States. Its population was 75 as of the 2010 census. Situated where the North Fork of the Payette River briefly calms and widens, its elevation is 4,554 feet (1,388 m) above sea level.
Payette River Scenic Byway
US 95 west of Marsing 
I-84 / US 30 from Nampa to Meridian 
US 20 / US 26 in Eagle 
