Deep Creek

Deep Creek is a 23,869-acre Inventoried Roadless Area in the Mountaintop Ranger District of the San Bernardino National Forest, occupying montane terrain on the desert-facing north slope of the San Bernardino Mountains in San Bernardino County. The varied topography includes Shay Mountain, Little Shay Mountain, Deer Mountain, Hawes Peak, Ingham Peak, and Luna Mountain, separated by Lion Canyon, Maloney Canyon, Dawn o'Day Canyon, Willow Canyon, and Luna Canyon. The hydrology is rated major. Lower Deep Creek and its tributaries — Willow Creek, Holcomb Creek, Little Bear Creek, Kinley Creek, Cox Creek, and Coxey Creek — drain the area northward toward the Mojave River within the Lower Deep Creek subbasin (HUC12 180902080104). A constellation of named springs — Hot Spring, Warm Spring, Cienega Spring, Chipmunk Spring, Luna Spring, Barrel Spring, Cup Spring, Cox Spring, Muddy Spring, and Dishpan Spring — supplies persistent water through Devils Hole and along the canyon bottoms.

The area spans an exceptionally steep ecological gradient. South-facing slopes and desert-side benches carry Mojave Desert Chaparral and Mojave Desert Mixed Scrub, with common chamise (Adenostoma fasciculatum), California buckwheat (Eriogonum fasciculatum), white sage (Salvia apiana), Mojave yucca (Yucca schidigera), and western Joshua tree (Yucca brevifolia; IUCN Vulnerable) marking the desert transition. Higher slopes carry Great Basin Pinyon-Juniper Woodland of single-leaf pine (Pinus monophylla) and California juniper (Juniperus californica), grading into Sierra Nevada Jeffrey Pine Forest and California Mixed Conifer Forest of Jeffrey pine (Pinus jeffreyi), ponderosa pine (Pinus ponderosa), sugar pine (Pinus lambertiana), white fir (Abies concolor), and big-cone Douglas-fir (Pseudotsuga macrocarpa). Southern California Oak Woodland of California black oak (Quercus kelloggii), canyon live oak (Quercus chrysolepis), and Palmer oak (Quercus palmeri; IUCN Near Threatened) holds mid-elevations. Foothill Streamside Woodland along Deep Creek supports white alder (Alnus rhombifolia), Fremont cottonwood (Populus fremontii), arroyo willow (Salix lasiolepis), and California sycamore (Platanus racemosa) — habitat for Lemon lily (Lilium parryi; IUCN Vulnerable).

Deep Creek itself supports a fragile assemblage of perennial-stream species. American dipper (Cinclus mexicanus) and California treefrog (Pseudacris cadaverina) occupy the cobble riffles and seep margins; two-striped gartersnake (Thamnophis hammondii) hunts amphibians along the banks. The conifer canopy is the breeding habitat of California spotted owl (Strix occidentalis occidentalis; IUCN Near Threatened) and Humboldt's flying squirrel (Glaucomys oregonensis). White-headed woodpecker (Leuconotopicus albolarvatus) and Lewis's woodpecker (Melanerpes lewis) work the open-pine snags. In the desert-edge chaparral, California thrasher (Toxostoma redivivum), wrentit (Chamaea fasciata), and black-chinned sparrow (Spizella atrogularis) hold breeding territories. Coast horned lizard (Phrynosoma blainvillii) and southern rubber boa (Charina umbratica; IUCN Vulnerable) occupy duff and rocky cover; mule deer (Odocoileus hemionus) and American black bear (Ursus americanus) move between conifer and chaparral. Portions of this area fall within the potential range of several federally listed species; see the Conservation section for details.

A person dropping into Lion Canyon passes from open pinyon-juniper into the shade of canyon live oak and big-cone Douglas-fir, the trail narrowing as the canyon deepens. Deep Creek's pools — warmed by Hot Spring and Warm Spring — emit faint plumes of steam in winter. The view from a high point on Shay Mountain reaches across the dry Mojave basin to the north and back up the long forested ridges that climb toward Big Bear. By midsummer the chaparral on the south-facing slopes pulses with cicada song; the riparian corridor below stays green.

Long before American settlement, the lands now within the Deep Creek Inventoried Roadless Area were the homeland of the Yuhaaviatam — "People of the Pines" — the Big Bear Valley clan of the Maara'yam, known to outsiders as Serrano [1]. The Serrano homeland extends across "present-day Antelope Valley on the west, southwest Mojave Desert to the north, portions of San Gabriel and San Bernardino Mountains in the center, the Inland Empire north of the city of Riverside to the south" [1]. The people who lived at Yuhaaviat — an area of pine trees near present-day Baldwin Lake in Big Bear — "were a Clan of Maara'yam (MAH-ra'-yahm) or Serrano people" [1]. Spanish missionization at San Gabriel from 1771 onward and later American settlement compressed Maara'yam life onto progressively smaller portions of their ancestral country [1]. In 1866, "a skirmish between settlers and non-Maara'yam (Serrano) Native Americans in the Summit Valley triggered a month-long killing spree of our peoples across the Big Bear area by a San Bernardino militia," after which only 20 to 30 surviving Yuhaaviatam were led away from the mountains [1].

Industrial settlement of the mountains followed gold. "On May 5, 1860, William Francis Holcomb and Ben Ware located five gold claims in Holcomb Valley, five miles north of Bear Valley. That was the start of the Holcomb Valley gold rush" [2]. Within a year the boomtown of Belleville sprang up in the valley adjoining what is now the Deep Creek country; "placer mining in the region continued into the 1870s," and quartz mines were worked into the twentieth century [2]. The wagon road built by Jed Van Dusen from Belleville dropped down the canyon "by Coxey's ranch and Rock Springs" [2] — the same Coxey country whose Cox Creek, Coxey Creek, and Cox Spring drain the southern edge of the Deep Creek roadless area. Lumber camps in the mountains supplied the building boom in the valley below; Holcomb himself "worked in mountain lumber camps for four years" after returning from Arizona [2].

Federal protection of the mountains came in three steps. President Benjamin Harrison created the original San Bernardino Forest Reserve in 1893 [3]. On July 1, 1908, President Theodore Roosevelt folded it into the Angeles National Forest [3]. On September 30, 1925, President Calvin Coolidge issued a proclamation reestablishing the San Bernardino National Forest as a separate unit "from parts of Angeles and Cleveland National Forests" [3][4]. Today the 23,869-acre Deep Creek Inventoried Roadless Area within the Mountaintop Ranger District remains protected under the 2001 Roadless Area Conservation Rule, draining the headwaters of Lower Deep Creek and the chain of small streams — Willow, Holcomb, Little Bear, Kinley, and Coxey — that feed it from the high country.

Vital Resources Protected

• Perennial Stream and Spring-Fed Riparian Corridor: Lower Deep Creek and its tributaries — fed by Hot Spring, Warm Spring, Cienega Spring, and a chain of additional named seeps — sustain one of the few perennial, low-gradient stream corridors on the desert-facing slope of the San Bernardino Mountains. The roadless condition preserves the cool, well-shaded pools and the cottonwood-willow streamside woodland that the federally endangered arroyo toad, southern mountain yellow-legged frog, and southwestern willow flycatcher (with designated critical habitat in this watershed) require for breeding.

• Desert-to-Conifer Elevational Gradient: The 23,869 unroaded acres span an exceptionally steep ecological gradient from Mojave Desert chaparral and Joshua tree woodland through pinyon-juniper to Jeffrey pine and mixed conifer forest. This intact gradient functions as a climate refugium and migration pathway, allowing both desert and montane communities to shift in response to warming — an adjustment that requires unbroken vertical habitat.

• Old-Conifer Structure and Big-Cone Douglas-Fir Habitat: California Mixed Conifer Forest and groves of big-cone Douglas-fir (Pseudotsuga macrocarpa), a Southern California endemic, preserve the multi-layered canopy, large-diameter snags, and cavity trees that California spotted owl and Humboldt's flying squirrel depend on. Without roads to fragment the canopy, interior conditions extend far enough from edges to support breeding populations.

Potential Effects of Road Construction

• Sedimentation of Arroyo Toad and Frog Breeding Habitat: Cut-and-fill on steep canyon slopes generates chronic fine-sediment inputs that bury the gravel bars and shallow pool margins arroyo toad and southern mountain yellow-legged frog need for egg deposition. Sediment-loaded inputs also raise water temperature and reduce dissolved oxygen in the spring-fed reaches — changes that the low-flow, low-energy Deep Creek system cannot quickly recover from.

• Loss of Streamside Woodland and Willow Flycatcher Habitat: Roads crossing or paralleling Deep Creek typically clear the riparian canopy along the right-of-way and constrain the channel through fill and culverts, eliminating the dense cottonwood-willow gallery that southwestern willow flycatcher requires for nesting. Once cleared, this riparian structure takes decades to recover and rarely returns to the multi-storied form needed by the species.

• Invasive Species Vectors Across the Desert-Conifer Gradient: New roads concentrate vehicles and pack stock that introduce cheatgrass (Bromus tectorum), poodle-dog bush (Eriodictyon parryi), and other disturbance-adapted species into otherwise inaccessible canyons and benches. In this fire-adapted system, the resulting fine-fuel buildup shortens fire-return intervals and pushes chaparral toward annual-grassland conversion, with cascading effects on the pinyon-juniper and conifer communities upslope.

Deep Creek's 23,869 acres in the Mountaintop Ranger District of the San Bernardino National Forest carry an unusually dense network of trails for a roadless area, anchored by four contiguous Pacific Crest Trail segments — PCT Section 10 (2000.10), 6.3 miles; Section 11 (2000.11), 6.6 miles; Section 12 (2000.12), 2.7 miles; and Section 13 (2000.13), 6.1 miles — totaling about 21.7 miles of through-route across the area. Backcountry hikers and PCT thru-hikers use the Splinters Cabin Trailhead and the Devil's Hole Trailhead as principal entry points.

The Hot Springs / Goat Trail (3W02), 1.4 miles, leads from the Bowen Ranch road network down to the well-known Deep Creek thermal pools. The Devils Hole Trail (2W01), 2.8 miles, drops into the canyon at its narrowest point. Longer routes include Redonda Ridge (1W17), 9.3 miles; Hawes Ranch (2W14), 4.9 miles; Muddy Springs (2W02), 3.0 miles; and Fisherman's / Crab Creek (2W07), 2.2 miles. Holcomb Crossing (2W08), 1.5 miles, drops into the Deep Creek bottom from the Holcomb Valley side. All listed trails are open to hikers, equestrians, and mountain bikers.

Designated campgrounds in or adjacent to the area include Crab Flats, Tent Peg Group, Ironwood Group, Big Pine Equestrian Group, and Fishermans Group. Big Pine Equestrian is configured for stock use; dispersed camping under San Bernardino National Forest regulations is permitted across most of the unroaded interior.

Fishing is well supported. Deep Creek itself is one of the few perennial trout streams in Southern California; rainbow trout (Oncorhynchus mykiss) and brown trout (Salmo trutta) are stocked and naturalized in the cold reaches, and the stream is managed in places under wild-trout regulations. California Department of Fish and Wildlife stream rules and seasonal closures apply.

Hunting includes mule deer (Odocoileus hemionus) in the conifer-chaparral transition and mountain quail (Oreortyx pictus) in the chaparral and pinyon-juniper zones; the area lies within Southern California deer zones for which CDFW big-game tags and zone-specific seasons govern access.

Birding is exceptional. Twenty-two eBird hotspots lie within 16 km of the area. The Deep Creek (lower) hotspot has logged 131 species across 71 checklists, and nearby hotspots — Hesperia Lake Park (164 species), Lake Gregory (162), Lake Arrowhead (151), Papoose Lake (136), and the Heaps Peak Arboretum (118) — sample the broader avifauna reachable from the area. Species in residence include American dipper along Deep Creek itself, California spotted owl in mixed conifer, white-headed and Lewis's woodpecker in pine snags, and California thrasher and wrentit in the chaparral.

Photography is rewarded at the Deep Creek thermal pools, at Devils Hole, and from high points on Shay Mountain and Hawes Peak that frame the Mojave basin below.

Every one of these activities depends on the roadless condition. The 21.7-mile PCT corridor exists as a continuous footpath because the canyon is not paralleled by a service road. The trout fishery survives because the riparian canopy and spring inputs are not disrupted by road crossings, culvert barriers, and sediment plumes. The thermal-pool experience — already among the most heavily visited on the southern PCT — would shift entirely in character if roads provided drive-up access, replacing the current foot-only approach with the vehicle traffic that elsewhere has overwhelmed similar destinations. New road construction would shorten the PCT into a series of road-broken segments and convert the Deep Creek experience into one accessible by, and shaped by, the road.