Question: Which national forest on Roan Mountain was created in 1920?

Context articles: Cache National Forest
Cherokee National Forest
Palouse National Forest
Roan Creek
Roan Mountain State Park
John T. Wilder House
Roan Mountain (Roan Highlands)
Carex roanensis
Tennessee State Route 143
Coconino National Forest

Cache National Forest is a 533,840-acre area of National Forest System land in Idaho and Utah which was established on July 1, 1908 by the U.S. Forest Service.
 The majority of its area is in Utah, and was initially created when the Bear River National Forest was disbanded.
 On July 1, 1915, all of Pocatello National Forest was added.
 In 1973 the Idaho portion was transferred to the administration of Caribou National Forest, while the Utah portion was combined administratively with Wasatch National Forest, creating the Wasatch-Cache National Forest.
 In descending order of forestland area, the Cache National Forest portion is located in Cache, Bear Lake, Franklin, Weber, Rich, Box Elder, Caribou, and Morgan counties.
 (Bear Lake, Franklin, and Caribou counties are in Idaho, and the rest in Utah.)
 The forest has a current area of 701453 acre , which comprises 43.56% of the combined Wasatch-Cache's total acreage.
 The forest is administered from Salt Lake City, Utah as part of the Wasatch-Cache National Forest, but there are local ranger district offices in Logan and Ogden.
 From circa 1911 until August 1923, the area was roamed by Old Ephraim.
The Cherokee National Forest is a large National Forest created on June 14, 1920 and managed by the U.S. Forest Service and encompassing some 655598 acre .
The Palouse Forest Reserve and after March 4, 1907, the Palouse National Forest was established by Presidential Proclamation (34 U.S. Statutes at Large 3293) on March 2, 1907 and was one of President Theodore Roosevelt's Midnight forests, created before the federal law banning new forest reserves in six western states, including Idaho, became effective.
 The conventional wisdom has the name ‘palouse’ being derived from the French term for the large treeless plain region in eastern Washington stretching into Idaho: the Palouse, a word meaning grassy spot or place.
 However, Boone says that the name could originate from the name of a major village of Palouse Indians, Palus, located at the confluence of the Palouse and Snake Rivers.
 'Palus' is the Sachapin Indian word for “something sticking down in the water,” in this case the something was a large rock, thought to be a beaver’s heart, and which had an important religious significance for the Palouse Indians.
 The Palouse National Forest had its administrative headquarters in the town of Wallace, Idaho for its 15-month existence and was administered by the U.S. Forest Service with 194404 acre .
 With the issuance of Executive Order 843 by President Roosevelt on June 26, 1908, with an effective date of July 1, 1908, the entire forest was absorbed by the Coeur d'Alene National Forest and the area ceased to be an independently administered national forest.
 The lands of the former Palouse National Forest were then administered as part of the Coeur d’Alene National Forest for three years before being combined with other lands to establish the St. Joe National Forest on July 1, 1911.
 The area of the former Palouse National Forest formed the western portion of the St. Joe National Forest.
 Once transferred in 1911, the area of the Palouse National Forest became the Palouse Ranger District of the St. Joe National Forest and is still considered part of the St. Joe National Forest.
 However, it has been administered by the Clearwater National Forest since the 1973 administrative merger of the Kaniksu National Forest, Coeur d’Alene, and St. Joe National Forests into the Idaho Panhandle National Forests.
Roan Creek is a tributary of the Watauga River that rises near the border between the U.S. states of Tennessee and North Carolina.
 Its source is located along the slopes of Snake Mountain near Trade in Johnson County, Tennessee.
 From its source, Roan Creek flows north, then turns west around the northern end of Stone Mountain.
 Then it flows south and west through Cherokee National Forest in the valley between Stone Mountain and Doe Mountain, until entering the Watauga River and Watauga Lake, the reservoir behind Watauga Dam.
 Its waters eventually flow through the Watauga River, the Holston River, the Tennessee River, the Ohio River, and the Mississippi River to the Gulf of Mexico.
Roan Mountain State Park is a Tennessee state park in Carter County, in Northeast Tennessee.
 It is close to the Tennessee-North Carolina border and near the community of Roan Mountain, Tennessee.
 Situated in the Blue Ridge of the Appalachian Mountains, the park preserves 2,006 acre of mostly hardwood forest.
 The park is in close proximity to 6,285 ft Roan Mountain and the Appalachian Trail, both of which are owned and managed by the US Forest Service.
The John T. Wilder House in Roan Mountain, Tennessee, United States, was one of the homes of John T. Wilder, the Union Army general and industrialist who built the Cloudland Hotel on Roan Mountain.
 The house was listed on the National Register of Historic Places in 1986.
 It is one of two homes on Main Street in Roan Mountain that Wilder built.
Roan Mountain is the highpoint of the Roan-Unaka Range of the Southern Appalachian Mountains, located in the Southeastern United States.
 The mountain is clad in a dense stand of Southern Appalachian spruce-fir forest, and includes the world's largest natural rhododendron garden, and the longest stretch of grassy bald in the Appalachian range.
 The Cherokee National Forest and Pisgah National Forest converge atop the mountain, with Roan Mountain State Park located near its northern base.
 The Appalachian Trail crosses most of the Roan's crest.
 The Roan High Knob Shelter is the highest backcountry shelter on the entire 2174 mi trail.
Carex roanensis is a species of sedge known by the common name Roan Mountain sedge.
 It is native to the United States, where it can be found in the southern Appalachian Mountains.
 It was first collected on Roan Mountain in Tennessee in 1936.
 It was not collected again for fifty years.
 Now it is known from Georgia, Kentucky, North Carolina, Pennsylvania, South Carolina, Tennessee, Virginia, and West Virginia.
State Route 143 (SR 143) is a 12.6 mile state highway that goes through the Cherokee National Forest and Roan Mountain State Park in northeastern Tennessee.
 The road is very curvy as it does go through a mountainous area.
 Its northern terminus is US 19E in the town of Roan Mountain and its southern terminus is NC 261.
The Coconino National Forest is a 1.856-million acre (751,000 ha) United States National Forest located in northern Arizona in the vicinity of Flagstaff.
 Originally established in 1898 as the "San Francisco Mountains National Forest Reserve", the area was designated a U.S. National Forest in 1908 when the San Francisco Mountains National Forest Reserve was merged with lands from other surrounding forest reserves to create the Coconino National Forest.
 Today, the Coconino National Forest contains diverse landscapes, including deserts, ponderosa pine forests, flatlands, mesas, alpine tundra, and ancient volcanic peaks.
 The forest surrounds the towns of Sedona and Flagstaff and borders four other national forests; the Kaibab National Forest to the west and northwest, the Prescott National Forest to the southwest, the Tonto National Forest to the south, and the Apache-Sitgreaves National Forest to the southeast.
 The forest contains all or parts of ten designated wilderness areas, including the Kachina Peaks Wilderness, which includes the summit of the San Francisco Peaks.
 The headquarters are in Flagstaff.
 There are local ranger district offices in Flagstaff, Happy Jack, and Sedona.