Which state is home to the road in northeastern Clark County which serves the oldest state park?
Nevada
Valley of Fire State Park
Valley of Fire State Park is a public recreation and nature preservation area covering nearly 46000 acre located 16 mi south of Overton, Nevada.
 The state park derives its name from red sandstone formations, the Aztec Sandstone, which formed from shifting sand dunes 150 million years ago.
 These features, which are the centerpiece of the park's attractions, often appear to be on fire when reflecting the sun's rays.
 It is Nevada's oldest state park, as commemorated with Nevada Historical Marker #150.
 It was designated as a National Natural Landmark in 1968.
Valley of Fire Road
The Valley of Fire Road (also called the Valley of Fire Highway) is a road in northeastern Clark County, Nevada serving the Valley of Fire State Park.
 The roadway was previously designated State Route 40 (SR 40), and the segment within the state park is currently designated a Nevada Scenic Byway.
Nevada State Route 170
State Route 170 (SR 170) is a state highway in northeastern Clark County, Nevada.
 Also known as Riverside Road, the route serves the Riverside townsite, the town of Bunkerville, and the city of Mesquite.
 The highway was previously a part of former U.S. Route 91 (US 91). Heyburn State Park
Heyburn State Park is an Idaho state park in Benewah County, Idaho in the United States.
 The park, founded in 1908, is the oldest state park in the Pacific Northwest.
 There are 5744 acre of land and 2332 acres of water in the park on three lakes.
 Heyburn Lake State Park is open for year-round recreation including camping, boating, hiking, horseback riding, fishing, and picnicking. Indian Springs State Park
Indian Springs State Park is a 528-acre (2.14 km²) Georgia state park located near Jackson and Flovilla.
 The park is named for its several springs, which the Creek Indians used for centuries to heal the sick.
 The water from these springs is said to have a sulfur smell and taste.
 Indian Springs is thought to be the oldest state park in the nation.
 It was acquired from the Creek Indians by the state through the Treaty of Indian Springs (1825) and the Treaty of Washington (1826).
 Thereafter, Indian Springs has been operated continuously by the state as a public park, although it did not gain the title "State Park" until 1931.
 The area became a resort town in the 19th century.
 It became an official "State Forest Park" in 1927.
 In 1931, along with Vogel State Park, it became a founding unit of Georgia's state park system. Clark County Sheriff's Office (Washington)
The Clark County Sheriff's Office is the local, county-level law enforcement agency serving Clark County, Washington.
 The Clark County Sheriff's Office was established in 1849 and is the oldest law enforcement organization in the state of Washington.
 The Clark County Sheriff's Office employs approximately 450 employees who serve in three distinct branches; enforcement, corrections, and support.
 The enforcement branch is composed of sworn deputy sheriffs who typically perform general policing duties such as patrolling the county, investigating crimes, serving arrest warrants, transporting prisoners, controlling disturbances, providing a safe atmosphere at large county events, along with a variety of other emergency and routine activities.
 Deputy sheriff's also serve in specialty assignments such as detectives, narcotics, SWAT, K9, marine patrol, school resource officer, explosive disposal unit, traffic homicide, sex offender monitoring, computer forensics, and child abuse investigations.
 Corrections deputies work in two different facilities; the main jail and the Lower River Road work center.
 The main jail is a medium and high security jail facility which houses an average of 600 inmates daily.
 The Lower River Road work center is a low-security jail facility which houses approximately 100 inmates.
 Support branch employees are non-sworn employees who work in criminal records, warrants, finance, human resources, admin, and in jail support roles supervising jail inmates who work in food and laundry services. Skyline-to-the-Sea Trail
The Skyline-to-the-Sea Trail is a 29.5-mile (47.2-kilometre) hiking trail that descends from the ridge of the Santa Cruz Mountains in California to the Pacific Ocean, passing through Castle Rock State Park and Big Basin Redwoods State Park.
 Big Basin is California's oldest state park.
 It contains beautiful waterfalls and some of the largest, tallest, and oldest Redwood forests left in existence. Nevada State Route 169
State Route 169 (SR 169) is a state highway in Clark County, Nevada, United States.
 It connects the Lake Mead National Recreation Area as well as the communities of Overton, Logandale, and the rest of the Moapa Valley to Interstate 15.
 While not part of SR 169 proper, the Valley of Fire Road and White Domes Road, within Valley of Fire State Park, connect to this route and are designated as Nevada Scenic Byways.
 The former, maintained by Clark County west of the park, was formerly signed as part of SR 169, and was earlier State Route 40.
 It is also called Northshore Road, Moapa Valley Boulevard, Valley of Fire Road, and Logandale Road. List of Georgia state parks
This is a list of state parks in Georgia.
 The park system of the US state of Georgia was founded in 1931 with Indian Springs State Park and Vogel State Park.
 Indian Springs has been operated by the state as a public park since 1825, making it perhaps the oldest state park in the United States.
 The newest state park is Don Carter. Minneopa State Park
Minneopa State Park is a state park in Minnesota, United States.
 It was established in 1905 to preserve Minneopa Falls, the largest waterfall in southern Minnesota, and was expanded in the 1960s to include the lower reaches of Minneopa Creek and a large tract of prairie.
 Minneopa is Minnesota's third oldest state park, after Itasca and Interstate.
 Two park resources are listed on the National Register of Historic Places: the 1862 Seppman Mill and a district of seven Rustic Style structures built by the Works Progress Administration in the late 1930s.
 The park is located almost entirely on the south side of the Minnesota River, 3 mi west of Mankato.
 In 2015 the state reintroduced American bison to the park in a 330 acre fenced enclosure, which visitors can drive through in their vehicles.