Devils Canyon

Devils Canyon spans 1,877 acres within the Ozark-St. Francis National Forest in northwestern Arkansas, occupying a lowland canyon system at approximately 906 feet elevation. The area drains into the headwaters of Mill Creek and the Mulberry River system, with Sycamore Creek flowing through the canyon itself. Water moves through this landscape as a constant presence—originating in seeps and springs along canyon walls, gathering in Sycamore Creek, and eventually feeding the larger Mulberry River drainage. The canyon's confined topography channels this water into a narrow corridor, creating distinct moisture gradients that shape the forest communities on either side.

The forest composition shifts across moisture and elevation gradients. Drier ridges and upper slopes support an Ozark-Ouachita Dry-Mesic Oak Forest dominated by white oak (Quercus alba) and shortleaf pine (Pinus echinata), with hairy alumroot (Heuchera villosa) and early azalea (Rhododendron prinophyllum) in the understory. Moving downslope into moister conditions, an Ozark-Ouachita Mesic Hardwood Forest takes hold, where American hornbeam (Carpinus caroliniana), common pawpaw (Asimina triloba), and Ozark witch-hazel (Hamamelis vernalis) create a dense midstory. The canyon floor and riparian zone support an Ozark-Ouachita Riparian community where northern maidenhair fern (Adiantum pedatum) and marginal wood fern (Dryopteris marginalis) carpet the ground. Ozark chinquapin (Castanea ozarkensis), a near threatened species, occurs throughout the mesic hardwood forest. Cliff faces and talus slopes within the canyon support the specialized Central Interior Acidic Cliff and Talus community, where Bradley's spleenwort (Asplenium bradleyi) and other rock-adapted plants persist on exposed stone.

The canyon's caves and crevices harbor four federally endangered bat species: the gray bat (Myotis grisescens), Indiana bat (Myotis sodalis), Northern long-eared bat (Myotis septentrionalis), and the Ozark big-eared bat (Corynorhinus townsendii ingens), which roosts in the canyon's cave systems and hunts insects above the forest canopy. The tricolored bat (Perimyotis subflavus), proposed for federal endangered status, also uses the canyon's cave habitat. In the riparian zone, the alligator snapping turtle (Macrochelys temminckii), proposed for federal threatened status, inhabits Sycamore Creek and deeper pools. The Oklahoma salamander (Eurycea tynerensis), a near threatened species, shelters under rocks and leaf litter in the moist canyon environment. Black bears (Ursus americanus) move through the forest, feeding on mast from oak and hickory, while wild turkeys (Meleagris gallopavo) forage on the forest floor. The monarch butterfly (Danaus plexippus), proposed for federal threatened status, passes through the area during migration, relying on native plants for nectar and larval host plants.

Walking into Devils Canyon, the transition is immediate. From the drier ridgetop where shortleaf pines stand open and light reaches the ground, the trail descends into increasing shade and moisture. The understory thickens with pawpaw and witch-hazel, and the air cools noticeably as elevation drops. The sound of Sycamore Creek grows louder—first a distant murmur, then a constant presence. Where the trail approaches the creek itself, the forest floor becomes a fern garden, with maidenhair and marginal wood ferns creating a soft, green understory beneath American hornbeam. The canyon walls rise on either side, their exposed rock faces supporting sparse vegetation adapted to stone and spray. In spring, the early azalea blooms along the canyon floor, and in autumn, the oaks and hickories drop mast that sustains the black bears and turkeys moving through the understory. At dusk, bats emerge from canyon caves to hunt insects above the canopy, their presence felt more than seen in the gathering darkness.

Archaeological surveys in the nearby Lee Creek Valley have identified prehistoric Native American sites dating back as far as eight thousand years. The Osage historically claimed and utilized the Ozark Plateau, including the region encompassing Devils Canyon, as a primary hunting territory and resource base. The Cherokee occupied parts of Northwest Arkansas between approximately 1817 and 1828 under treaty, inhabiting and traversing the broader region that includes Devils Canyon during this era. Indigenous peoples used the rugged terrain of the Ozark Mountains, including areas like Devils Canyon, primarily as hunting grounds.

European-American settlement of the Boston Mountain region and Lee Creek Valley occurred prior to 1836. These settlers engaged in subsistence farming and livestock grazing, leaving remnants of old homesteads, stone foundations, and rock walls throughout the rugged canyons. The Butterfield Overland Stagecoach route, which operated between 1858 and 1861, passed within five miles of this general area, utilizing the Boston Mountains to move mail and passengers between Missouri and Fort Smith. During the American Civil War, the region's sandstone crevices and caves served as hideouts for Confederate guerrilla groups who used the terrain to stage raids on Union supply lines moving along nearby transportation corridors. Local historical accounts indicate that the area's sandstone crevices and cave formations were subsequently used as hideouts by outlaws and stagecoach robbers in the mid-to-late nineteenth century.

The Ozark National Forest was established by proclamation signed by President Theodore Roosevelt on March 6, 1908, to protect and manage the region's hardwood timber. President Theodore Roosevelt added approximately 600,000 acres to the forest in February 1909. President William Howard Taft withdrew 562,981 acres on December 28, 1910, primarily to address unperfected homestead claims. President Calvin Coolidge added 122,489 acres by proclamation in 1928. President Franklin D. Roosevelt increased the forest's gross acreage by 389,935 acres in 1936, transferred the Boston Mountain Land Utilization Project (31,681 acres) to the forest in 1940, and transferred the Magazine Mountain Ranger District (131,697 acres) from the Ouachita National Forest by executive order in 1941. The Henry R. Koen Experimental Forest was added to the Ozark National Forest on June 14, 1950.

Between 1933 and 1942, the Civilian Conservation Corps was responsible for clearing forest roads and trails that provide access to the Devils Canyon area. The St. Francis National Forest was established by proclamation signed by President Dwight D. Eisenhower on November 8, 1960, to preserve approximately 917,944 acres of hardwood timberland, making it the only major hardwood forest under government protection at that time. The Ozark National Forest and St. Francis National Forest were placed under joint administration on January 15, 1961, and are now managed as the Ozark-St. Francis National Forests with headquarters in Russellville, Arkansas. Devils Canyon is protected under the 2001 Roadless Area Conservation Rule as a 1,877-acre Inventoried Roadless Area within the Boston Mountain Ranger District.

Vital Resources Protected

Endangered Bat Maternity and Foraging Habitat

Devils Canyon supports four federally endangered bat species—gray bat, Indiana bat, northern long-eared bat, and Ozark big-eared bat—whose survival depends on the area's unfragmented forest canopy and cave-adjacent riparian corridors. These bats roost in canyon caves and cliffs, then forage across the surrounding forest for insects; the roadless condition preserves the continuous canopy structure and intact understory that these species require to navigate safely between roosts and feeding areas. Road construction would fragment this foraging landscape, forcing bats to cross open areas where they are vulnerable to predation and collision, and would reduce insect abundance through canopy loss and edge effects.

Headwater Stream Integrity for Aquatic Species

Devils Canyon contains the headwaters of Mill Creek and Mulberry River, which drain into the Arkansas River system. The area's roadless status maintains riparian forest cover and prevents chronic sedimentation that would degrade spawning and rearing habitat for native fish and aquatic invertebrates. The canyon's steep terrain and acidic soils make erosion from road cuts and fill particularly severe—sediment mobilized from cut slopes would travel directly into headwater channels, smothering the clean gravel and cobble substrates that aquatic species depend on and raising water temperatures through canopy removal.

Rare Plant Communities in Stable Canyon Microclimates

Devils Canyon is designated a Botanical Special Interest Area because it contains rare plant assemblages—including near-threatened Ozark chinquapin—adapted to the cool, moist microclimates of the canyon floor and cliff faces. These species occupy narrow elevational and moisture gradients that have remained stable because the roadless area has not been subject to soil disturbance, drainage alteration, or canopy removal. Road construction would destabilize these microclimates through fill placement that alters water movement, canopy opening that increases temperature and evaporation, and soil compaction that changes moisture retention—changes that are difficult to reverse in systems where plant communities are finely tuned to specific hydrological conditions.

Interior Forest Habitat for Sensitive Wildlife

The 1,877-acre roadless block provides unfragmented forest interior habitat for the federally threatened American burying beetle and other species of greatest conservation need documented in the Arkansas Wildlife Action Plan. These species require large, continuous forest blocks away from edge effects; the roadless condition prevents the creation of forest edges that would increase predation pressure, invasive species colonization, and microclimate changes that degrade habitat quality across the surrounding landscape.

Threats from Road Construction

Sedimentation and Stream Temperature Increase from Canopy Removal

Road construction in Devils Canyon's steep terrain would require cut slopes that expose bare soil and rock directly to rainfall, generating chronic erosion that would transport sediment into Mill Creek, Mulberry River, and Sycamore Creek headwaters. Simultaneously, removal of riparian forest canopy to accommodate road prism and sight lines would increase water temperature by reducing shade, a particularly severe impact in headwater streams where even small temperature increases can exceed the thermal tolerance of cold-water adapted species. The combination of sedimentation and warming would degrade spawning substrate and reduce dissolved oxygen in pools, directly harming aquatic invertebrates and any fish species dependent on these headwater systems.

Habitat Fragmentation and Edge Effect Expansion for Bat Populations

Road construction would bisect the continuous forest canopy that gray bats, Indiana bats, northern long-eared bats, and Ozark big-eared bats use to commute between canyon roosts and foraging areas. The road corridor itself would create an open gap that bats avoid crossing, fragmenting their foraging landscape into isolated patches. The road edges would also generate microclimate changes—increased light, wind, and temperature fluctuation—that reduce insect abundance and alter the vegetation structure bats depend on for navigation, forcing longer, more dangerous flights and reducing foraging efficiency during the critical maternity season when females must gain weight to support lactation.

Invasive Species Establishment and Spread Along Road Corridor

Road construction would create a linear disturbance corridor—compacted soil, exposed mineral substrate, and altered hydrology—that serves as a colonization pathway for invasive plants and feral swine documented as threats to the Boston Mountain district. Japanese honeysuckle, privet, and other invasive plants would establish along the road edge and spread into adjacent forest, outcompeting native understory vegetation that provides food and cover for the American burying beetle and other sensitive species. Feral swine would use the road as an access route to reach previously undisturbed riparian zones, where they would root and trample the rare plant communities and soil structure that support the Ozark chinquapin and other near-threatened botanical species.

Disruption of Canyon Microclimate Stability

Road fill and drainage structures would alter the hydrological regime of Devils Canyon's cliff and talus ecosystem and canyon floor, disrupting the cool, moist conditions that rare plant communities and species like the Oklahoma salamander depend on. Cut slopes would increase surface runoff and reduce seepage into the canyon, while fill placement would block groundwater movement and alter soil moisture patterns. These changes would be particularly difficult to reverse because the canyon's narrow, steep topography limits options for hydrological restoration, and the rare plant communities that depend on stable microclimates recover slowly or not at all once their moisture and temperature conditions have shifted.

Hiking to Waterfalls and Canyon Overlooks

Devils Canyon Falls Trail is the primary hiking destination in this 1,877-acre roadless area. The out-and-back route covers 3.25 to 4 miles round-trip, beginning on an old forest road and transitioning to a volunteer (unmarked) single-track trail marked by cairns. The hike passes through a boulder maze of large rock formations before reaching overlooks of the deep canyon. The trail features two waterfalls: Devils Canyon Junior Falls (approximately 15 feet, with an emerald pool) and the taller Devils Canyon Falls. The final descent to the main falls is steep and technical, requiring a rope assist at the bluffline to navigate safely. Difficulty ranges from easy to moderate on the approach, with a strenuous section at the descent. The trail is best visited in winter or spring when water flow is highest; fall leaf cover can make the volunteer trail difficult to follow. Access is via an unmarked dirt road off Arkansas Highway 215, approximately 7.8 miles north of I-40 (Exit 24), with two parking areas available. As of late 2024, the motorized portion has been temporarily closed for restoration, though foot access remains open.

Hunting Deer, Bear, Turkey, and Small Game

The roadless area lies within the Ozark National Forest WMA and Deer Management Zone 11. A free annual General Use Permit is required. White-tailed deer, black bear, and wild turkey are the primary big-game species; squirrel, rabbit, raccoon, bobcat, and opossum are also present. Archery deer season runs late September through February; modern gun season occurs in November and late December. Bear seasons run concurrently with deer seasons in October and November. Turkey season includes youth hunts in mid-April and the main firearms season in late April to early May. The area is within the CWD Management Zone, with specific carcass movement and baiting restrictions. Dogs are prohibited for deer hunting but allowed for small game and required for night hunting of furbearers. The steep canyon terrain, sandstone bluffs, and boulder maze make this a rugged, walk-in hunting destination with no developed internal roads.

Mountain Biking and Horseback Riding on Forest Roads

Mountain biking and horseback riding are permitted on forest roads and ATV trails within the roadless area. The initial mile of the Devils Canyon Falls route follows a full-width road suitable for these uses, though the surface can be muddy and rutted. The technical descent to the waterfalls is not suitable for standard biking. Horseback riders can access the area via the same forest roads from Arkansas Highway 215. No designated equestrian-only trails are formally established within the roadless boundary.

Fishing in Canyon Streams

Mill Creek and Sycamore Creek are the major hydrological features of the canyon, forming headwaters of the Mulberry River system. However, no fish species are specifically documented for these reaches within the roadless area, and no stocking programs support these waters. Fishing is governed by general Arkansas Game and Fish Commission regulations with no special restrictions documented. Access to interior canyon streams requires hiking via unofficial trails or rough ATV tracks; high-clearance vehicles are recommended to reach parking areas. The area is primarily recognized for hiking and waterfalls rather than as a fishing destination, and seasonal water flow in headwater streams may be insufficient during dry periods.

Roadless Recreation Character

The absence of roads through this canyon landscape is essential to the recreation opportunities here. The volunteer trail to Devils Canyon Falls, the steep technical descent, and the boulder maze remain undisturbed by road construction. Hunters access the area on foot through unmarked trails and old ATV tracks, maintaining the walk-in character that defines hunting in this rugged terrain. Mountain bikers and horseback riders use forest roads at the area's edge, but the interior canyon remains roadless, preserving the quiet, unfragmented habitat that supports black bear, wild turkey, and the full range of forest species. The cold headwater streams of Mill Creek and Sycamore Creek flow through undisturbed riparian forest, free from road-related erosion and sedimentation. This roadless condition — the absence of through-routes and developed infrastructure — is what sustains the canyon's appeal as a backcountry hiking destination and a remote hunting area.