Cedar Knoll

Cedar Knoll is a 22,502-acre Inventoried Roadless Area within the Manti-Lasal National Forest in Utah, occupying mountainous terrain on the Wasatch Plateau in Utah County. The area extends across a broken landscape of named hollows, ridges, and canyons—Dry Hollow, Blind Canyon, Spring Hollow, Coffeepot Ridge, Coal Hollow, Cedar Knoll, Cox Canyon, Barney Hollow, Ives Canyon, and Long Hollow—that drain water off the plateau. The headwaters of Middle Thistle Creek originate within Cedar Knoll, fed by Dipping Pen Creek, Coffeepot Creek, Lake Fork, and multiple named tributary branches including Right Fork, Left Fork, East Lake Fork, and West Lake Fork. Perennial springs—Little Bear Spring, Slab Pile Spring, Coffeepot Spring, Mud Spring, Buggy Wheel Spring—sustain seeps throughout the terrain, and Smiths Reservoir collects runoff on the plateau surface, making Cedar Knoll a major contributor to the Middle Thistle Creek watershed.

Vegetation shifts markedly with elevation and aspect. Rocky Mountain Gambel Oak Shrubland is the dominant community on south- and west-facing slopes at lower elevations—Gambel oak (Quercus gambelii) thickets mixed with antelope bitterbrush (Purshia tridentata), bigtooth maple (Acer grandidentatum), and mountain mahogany (Cercocarpus montanus). Drier ridges and foothill terrain carry Colorado Plateau Pinyon-Juniper Woodland, where two-needle pinyon pine (Pinus edulis) stands alongside Rocky Mountain juniper (Juniperus scopulorum); limber pine (Pinus flexilis) appears on exposed rocky outcrops. Moving onto moister north-facing slopes, Southern Rockies Mixed Conifer Forest takes over, with white fir (Abies concolor) and Douglas-fir (Pseudotsuga menziesii) forming closed canopies above an understory of Oregon boxwood (Paxistima myrsinites) and creeping mahonia (Berberis repens). Rocky Mountain Aspen Forest occupies moist mid-elevation terrain, where quaking aspen (Populus tremuloides) canopy supports arrowleaf balsamroot (Balsamorhiza sagittata) and thimbleberry (Rubus parviflorus) in a lush understory. Rocky Mountain Dry Subalpine Spruce-Fir Forest and subalpine meadow cap the uppermost ridgelines.

Wildlife across Cedar Knoll reflects the structural diversity of this vegetation mosaic. Wapiti (Cervus canadensis) move through aspen and mixed-conifer forest, foraging in meadow openings along Coffeepot Ridge and the upper hollow systems. Golden eagle (Aquila chrysaetos) and Swainson's hawk (Buteo swainsoni) hunt the open sagebrush and shrubland zones. In the mixed-conifer interior, Clark's nutcracker (Nucifraga columbiana) works the limber pine and spruce stands, caching seeds in a pattern that shapes forest regeneration over decades. Lewis's woodpecker (Melanerpes lewis) uses open ponderosa pine woodland where standing snags provide foraging substrate. Near the spring-fed drainages and Smiths Reservoir, western tiger salamander (Ambystoma mavortium) and northern leopard frog (Lithobates pipiens) occupy the wet meadow and slow-water habitats. Portions of this area fall within the potential range of several federally listed species; see the Conservation section for details.

A hiker following the Sky High Trail (5106, 7.4 miles) moves through the area's vegetation gradient—from Gambel oak and sagebrush on the lower ridges through closed mixed-conifer stands into aspen groves and subalpine terrain, where Coffeepot Ridge and the upper hollow systems open onto long views across the Wasatch Plateau.

Cedar Knoll's 22,502 acres rise along the Wasatch Plateau in what is today Utah County, within one of the most heavily settled landscapes of the Great Basin and Colorado Plateau. Long before any formal designation, the lands were home to several Ute bands whose presence stretched back through the Late Prehistoric period. The Timanogots occupied the southern and eastern perimeters of Utah Lake in Utah Valley in north-central Utah [1], while the San Pitch, or Sanpits, held Sanpete Valley in central Utah and the Sevier River Valley [1]—the highland corridor that encompasses much of the land now within the Manti-La Sal National Forest. Together these peoples were part of the larger Ute Nation, which once covered most of Utah, Colorado, and northern New Mexico [2]. The Ute people inhabited much of the Colorado Plateau and are most likely descendants of the people living in the area during the Late Prehistoric period [3], living by seasonal mobility, hunting, and gathering. The introduction of the horse after the Pueblo Revolt of 1680 changed the Ute way of life more dramatically than almost any other event [3], extending their range and reinforcing the trade networks that made the Wasatch Plateau central to their territorial world.

Euro-American contact came first through Spanish exploration and then, decisively, with the arrival of thousands of Mormon settlers along the Wasatch Front beginning in 1847, which set off conflicts between the newcomers and the Ute bands already living in the Utah and Salt Lake Valleys [3]. Federal pressure to resolve these conflicts produced the Utah Indian Treaty of 1865, signed at the Spanish Fork Indian Farm, which relinquished all Ute lands in the territory of Utah to the U.S. Government in exchange for reservation lands in the Uinta Basin [3]. By 1865, all Utes along the Wasatch Front were being moved to the Uintah Valley Reservation [3]. By 1882, the several Ute bands had been pushed off their wide-ranging homeland and consolidated onto reservations in eastern Utah [2].

Removal opened the Wasatch Plateau and its forested slopes to rapid commercial exploitation. Mormon settlers had constructed sawmills in the nearby canyons within years of their arrival, and by the 1870s and 1880s large commercial operators had pushed into the region's timber. David Eccles, a Utah businessman, opened sawmills near Scofield in Carbon County—directly adjacent to the lands now managed by the Price Ranger District—and his operations were reported to use destructive methods, burning the side hills to kill the timber, then harvesting only the choicest trees and leaving the rest to rot [6]. By 1880, lumber operations had stripped the west base of the Wasatch Mountains, and various areas of northeastern and north-central Utah were short of timber [6]. Livestock grazing on the plateau compounded the damage; overgrazing by cattle and sheep degraded mountain range across the region through the 1880s and 1890s.

Federal protection arrived under President Theodore Roosevelt, who signed Proclamation 499 on May 29, 1903, establishing the Manti Forest Reserve [4, 5]. The proclamation drew authority from section twenty-four of the Act of Congress approved March 3, 1891, reserving Utah public lands covered with timber in the public interest [4]. Boundary expansions and adjustments followed through subsequent years. On August 28, 1950, the name was changed to the Manti-La Sal National Forest [5]. Cedar Knoll is today protected within that forest under the 2001 Roadless Area Conservation Rule, administered by the Price Ranger District of the USFS Intermountain Region.

Vital Resources Protected

Cold Headwater Stream Integrity

Cedar Knoll encompasses the headwaters of Middle Thistle Creek and a network of named tributary systems—Dipping Pen Creek, Coffeepot Creek, Lake Fork, and their multiple named forks—that originate within the area's undisturbed montane terrain. The roadless condition preserves intact riparian buffers and perennial springs (Little Bear Spring, Coffeepot Spring, Mud Spring, and others) that regulate stream temperature and filter sediment before it reaches downstream channels. Headwater streams at this elevation establish the hydrological baseline for the entire Middle Thistle Creek watershed and sustain the aquatic habitat conditions used by western tiger salamander and northern leopard frog.

Elevational Gradient Connectivity

Cedar Knoll supports an unbroken elevational sequence from semi-desert shrub-steppe and Colorado Plateau Pinyon-Juniper Woodland at the lower margins, through Rocky Mountain Gambel Oak Shrubland, Southern Rockies Mixed Conifer Forest, and Rocky Mountain Aspen Forest, to Rocky Mountain Dry Subalpine Spruce-Fir Forest and subalpine meadow at the crest. Without road corridors fragmenting this gradient, species that move vertically with seasonal resources—wapiti, raptors, and cavity-nesting birds—can track habitat conditions across elevation bands. The continuous canopy of the mixed-conifer and aspen zones maintains interior forest conditions free of edge effects for area-sensitive species, including the federally Threatened Mexican spotted owl (Strix occidentalis lucida), which requires large blocks of multi-layered, structurally complex forest.

Sagebrush and Shrubland Mosaic Integrity

Intermountain Mountain Sagebrush Steppe, Rocky Mountain Gambel Oak Shrubland, and Colorado Plateau Pinyon-Juniper Woodland together cover the majority of Cedar Knoll's lower-elevation area. The roadless condition limits the primary establishment pathway for invasive annual grasses—particularly cheatgrass (Bromus tectorum)—which colonize most readily along disturbed road corridors and then expand into adjacent native shrubland. Maintaining this mosaic intact sustains the structural complexity of pinyon-juniper woodland on which Pinyon Jay (Gymnorhinus cyanocephalus), a species under federal review, depends for foraging and nesting; cheatgrass-driven conversion reduces the seed-producing trees Pinyon Jay requires year-round.

Potential Effects of Road Construction

Sedimentation of Headwater Drainages

Road construction across Cedar Knoll's hollow and canyon terrain would place cut slopes and fill material directly above the headwater drainages of Middle Thistle Creek. Chronic erosion from road surfaces delivers fine sediment to stream channels year-round, filling pools, elevating turbidity, and degrading the spring-fed habitats that support northern leopard frog and western tiger salamander. Stream crossings and culverts introduce physical barriers that disrupt longitudinal connectivity; sediment effects accumulate progressively and cannot be reversed by culvert removal alone.

Forest Fragmentation and Edge Effects

Road construction fragments the continuous mixed-conifer and aspen stands that currently provide interior forest conditions across Cedar Knoll's mid-elevation terrain. Road corridors introduce edges that reduce effective interior forest area, increase light penetration and drying at forest margins, and elevate disturbance near nesting territories. Mexican spotted owl requires large blocks of multi-layered forest; road-driven fragmentation reduces contiguous canopy available for pair territories, while edge effects in aspen stands degrade the understory structure that characterizes undisturbed Rocky Mountain Aspen Forest.

Invasive Grass Establishment in Sagebrush and Pinyon-Juniper Systems

Road construction across the sagebrush steppe and pinyon-juniper foothill zones creates disturbed mineral soil corridors that facilitate cheatgrass establishment. Once established, cheatgrass increases fine fuel loads and fire frequency—converting perennial shrubland to annual grassland in a feedback cycle that is extremely difficult to reverse. The Rocky Mountain Gambel Oak Shrubland and Colorado Plateau Pinyon-Juniper Woodland, the dominant ecosystem types by area coverage, are both identified as vulnerable to this conversion pathway, which degrades the structural complexity on which Pinyon Jay and other shrubland-dependent species depend.

Cedar Knoll offers 13 named trails totaling more than 36 miles across the Manti-Lasal National Forest's Wasatch Plateau terrain in Utah County. The Sky High Trail (5106, 7.4 miles, native surface, hiker/horse) is the longest route, traversing the upper ridgeline through the area's full elevational range—from Gambel oak and sagebrush at the lower margins to aspen and subalpine terrain at the crest. The Sweat Creek Trail (5042, 4.6 miles, hiker/horse) and Coffeepot Trail (5327, 4.6 miles, hiker/horse) follow two of the area's major drainage systems along native-surface tread. The Blind Canyon Trail (5204, 2.8 miles, hiker) and its south spur (5207, 0.9 miles) enter from the eastern terrain, while Ives Canyon Trail (5325, 3.2 miles), Jones Ridge Trail (5043, 3.0 miles), and Right Fork Lake Fork Trail (5326, 3.9 miles) serve the southern and western portions of the area. Interior drainages are accessible via the Dipping Pin Trail (5330, 1.7 miles), Dry Creek Trail (5329, 1.5 miles), East Lake Fork Trail (5332, 1.0 miles), Sweat Creek 2 Trail (5328, 1.8 miles), and Dry Creek Trail South (5045, 0.7 miles). No designated trailheads or developed campgrounds are located within the roadless area boundary; most parties access trails from national forest roads on the plateau perimeter and use dispersed camping outside the roadless boundary.

Birding

Cedar Knoll's position on the Wasatch Plateau places it within a regionally productive birding zone. Diamond Fork Canyon, approximately 17 kilometers from the area boundary, records 182 confirmed species across 796 eBird checklists, making it the most active hotspot in the region. The Nebo Loop corridor (142 species) and Payson Lakes (116 species) represent comparable montane habitat nearby. Within Cedar Knoll's vegetation mosaic, Lewis's woodpecker (Melanerpes lewis) uses open ponderosa pine woodland with standing snags for foraging and nesting; Clark's nutcracker (Nucifraga columbiana) works limber pine and spruce stands throughout the conifer zone. Virginia's warbler (Leiothlypis virginiae) and Cassin's finch (Haemorhous cassinii) occupy shrub-edge and mixed-conifer habitat. Golden eagle (Aquila chrysaetos) and Swainson's hawk (Buteo swainsoni) use the open sagebrush and foothill zones, and mountain bluebird (Sialia currucoides) occupies open terrain with scattered trees across the area.

Hunting and Wildlife Observation

Cedar Knoll's hollow systems and mid-elevation aspen and mixed-conifer forest support wapiti (Cervus canadensis) across the area. Wild turkey (Meleagris gallopavo) occupies Gambel oak and forest-edge habitat. The area's roadless character means game animals encounter low motorized pressure during hunting seasons, giving hunters on the interior trail network access to undisturbed range. Reptile observers find western rattlesnake (Crotalus oreganus), gophersnake (Pituophis catenifer), common sagebrush lizard (Sceloporus graciosus), and western skink (Plestiodon skiltonianus) on warm, rocky south-facing slopes in the foothill zones.

Horseback Riding

Three trails are designated for combined hiker/horse use: Sky High Trail (5106, 7.4 miles), Sweat Creek Trail (5042, 4.6 miles), and Coffeepot Trail (5327, 4.6 miles), providing roughly 16.5 miles of equestrian-accessible terrain along the ridgeline and two primary drainages. The absence of motorized traffic on these native-surface routes maintains conditions for horse travel across the Wasatch Plateau.

Roadless Character

The recreation Cedar Knoll supports depends on the absence of roads within its boundary. Trail travel on Sky High and Coffeepot routes delivers users into undisturbed hollow systems without vehicle traffic. Wapiti range and raptor hunting territory in the interior are accessible because no road corridors fragment the terrain. Road construction across the hollow systems would fragment drainage corridors the trail network currently follows, introduce motorized access into hunting areas, and convert the quiet backcountry character that distinguishes these 36 miles of trail from recreation areas with vehicle corridors. Cheatgrass establishment along new road margins would also degrade the sagebrush and foothill shrubland habitat that supports Lewis's woodpecker habitat and shrubland birding along the lower trail segments.