Sierra Negra Rare II Study Area

The Sierra Negra Rare II Study Area covers 9,470 acres on the El Rito Ranger District of the Carson National Forest in north-central New Mexico. The area takes its name from Sierra Negra and is dissected by the steep walls of Madera Cañon. Water leaves this country through the Outlet El Rito headwaters, gathered into a network of named arroyos — Arroyo Hondo, Arroyo de Soldados, Arroyo las Tunas, Arroyo del Cerrito Negro, Arroyo del Perro, and Arroyo del Perro del Oeste — that carry seasonal runoff downslope. Alamittos Spring and Ojito Sastras provide perennial seeps in an otherwise ephemeral-flow landscape. This is a major-significance watershed for the El Rito basin, and the unroaded condition preserves the timing and clarity of its delivered flow.

The vegetation sorts strongly along an elevation and moisture gradient. Lower slopes and basin floors carry Intermountain Semi-Desert Shrub-Steppe, Intermountain Greasewood Flat, Intermountain Salt Desert Scrub, and Great Basin Big Sagebrush Shrubland, where big greasewood (Sarcobatus vermiculatus), four-wing saltbush (Atriplex canescens), shadscale (Atriplex confertifolia), Apache-plume (Fallugia paradoxa), and blue grama (Bouteloua gracilis) hold the soil against runoff. Intermountain Semi-Desert Grassland and Intermountain Mountain Sagebrush Steppe occupy the gentler benches. Mid-elevations support Colorado Plateau Pinyon-Juniper Woodland and Southern Rockies Pinyon-Juniper Woodland, where two-needle pinyon pine (Pinus edulis) and Southern Rockies Juniper Woodland form open canopies above winter-fat (Krascheninnikovia lanata), pale wolf-berry (Lycium pallidum), and panhandle prickly-pear (Opuntia polyacantha). Above these, Rocky Mountain Gambel Oak Shrubland and Southern Rockies Ponderosa Pine Woodland and Savanna take over, with ponderosa pine standing among scarlet hedgehog cactus (Echinecereus coccineus) and fendler's hedgehog cactus (Echinocereus fendleri). The highest ground reaches Southern Rockies Mixed Conifer Forest and small openings of Northern Rockies Subalpine Grassland. Narrowleaf willow (Salix exigua) and Rocky Mountain Foothill Streamside Woodland line the named arroyos where flow concentrates.

Wildlife sorts by habitat band. The pinyon-juniper canopy supports pinyon jay (Gymnorhinus cyanocephalus) and Steller's jay (Cyanocitta stelleri), with curve-billed thrasher (Toxostoma curvirostre) and Bendire's thrasher (Toxostoma bendirei) working the shrub-steppe edges. The Southern Rockies Mixed Conifer Forest holds Cassin's finch (Haemorhous cassinii) and Townsend's solitaire (Myadestes townsendi). Lewis's woodpecker (Melanerpes lewis) takes burned-snag country in ponderosa stands; Virginia's warbler (Leiothlypis virginiae) sings from gambel oak; broad-tailed hummingbird (Selasphorus platycercus) and the IUCN near-threatened rufous hummingbird (Selasphorus rufus) work paintbrush (Castilleja) and beardtongues. The IUCN vulnerable desert bluebells (Phacelia campanularia) hold scattered locations on dry slopes. Eastern collared lizard (Crotaphytus collaris) and plateau striped whiptail (Aspidoscelis velox) bask on warm exposures, and golden eagle (Aquila chrysaetos) hunts the open country from above. Portions of this area fall within the potential range of several federally listed species; see the Conservation section for details.

A visitor climbing out of the El Rito watershed crosses the entire sequence of communities in a few miles. The first ground is shrub-steppe and greasewood flat with broad views of the arroyo system; the trail enters pinyon-juniper woodland, where the air is resinous and the shade is broken; gambel oak signals the climb into ponderosa savanna; and the last stretch enters mixed-conifer forest near Sierra Negra and the upper rim of Madera Cañon.

The mountainous country drained by the Outlet El Rito and its arroyos lies within the homeland of Tewa-speaking Pueblo peoples, whose ancestors arrived in the river valleys of north-central New Mexico around 1200 CE [3]. Descendants of the ancestral Puebloans developed dry-land farming of corn, squash, beans, and cotton along the Rio Chama and Rio Grande, building irrigation networks and pueblo-style settlements [3]. The Tewa-speaking Santa Clara Pueblo and the Jicarilla Apache Nation are today federally recognized in Rio Arriba County, the political boundary that contains the Sierra Negra area [4].

Spanish colonization reorganized this country in the late sixteenth and seventeenth centuries. In 1598, Juan de Oñate led colonists up the Rio Grande and renamed the Pueblo of Yuque-Yunque as San Juan de los Caballeros, founding the territory's first capital [3]. Following the 1680 Pueblo Revolt under Popé and the Spanish reconquest of 1692, the Crown developed outposts including Abiquiú, Truchas, and Ojo Caliente — settled by Mexican Indians, mixed-blood Spaniards, and genízaros (Hispanicized Indians purchased out of captivity who could earn standing as vecinos, or landowners, by holding the frontier) [3]. Villages built around plazas were surrounded by ejidos, communal lands used for grazing, wood-gathering, hunting, and orchards [3]. The El Rito country, on the western flank of Rio Arriba, fell within this system of land grants and communal use.

After the United States acquired the territory under the 1848 Treaty of Guadalupe Hidalgo, Article 10 — which would have honored Spanish and Mexican land grants — was struck before ratification, and many ejidos passed into private or federal hands [3]. The railroad arrived late in the nineteenth century: in 1880 and 1881, the Denver and Rio Grande Western Railroad extended into the Española valley, where it was christened "The Chili Line" [3]. Mining and logging became important local industries, and small commercial towns rose beside older Hispanic villages [3].

Federal forest reservation followed quickly. Congress authorized forest reserves under the Creative Act of 1891 (the General Land Law Revision Act), and on November 7, 1906, the Taos Forest Reserve was proclaimed in northern New Mexico under 34 Stat. 3262 [2]. By Executive Order dated June 26, 1908, the Taos National Forest and a part of the Jemez National Forest were consolidated under the name of the Carson National Forest, effective July 1, 1908 [1]. On March 2, 1909, by Proclamation 863, President Theodore Roosevelt enlarged the Carson National Forest, adding lands "in part covered with timber" and certain lands that had been part of the Jicarilla Apache Indian Reservation, established by Executive Order on February 11, 1887 [1]. The Jicarilla lands taken in 1909 were returned to the tribe in 1912 [2].

In 1912, the year of New Mexico statehood, huge sections of communal land grants were fenced off from local grazing, watering, and wood-gathering — fueling enduring conflict over use of the Carson; villagers responded with La Mano Negra, a secret organization that cut fences and burned haystacks [3]. The 9,470-acre Sierra Negra Rare II Study Area, identified during the second Roadless Area Review and Evaluation, sits within the El Rito Ranger District and is protected under the 2001 Roadless Area Conservation Rule.

Vital Resources Protected

• Headwater Protection of the Outlet El Rito Watershed: The 9,470-acre Sierra Negra roadless area holds the unroaded headwaters of the Outlet El Rito and the named arroyo network — Arroyo Hondo, Arroyo de Soldados, Arroyo las Tunas, Arroyo del Cerrito Negro, Arroyo del Perro, and Arroyo del Perro del Oeste — together with Alamittos Spring and Ojito Sastras. Without road cuts on the steep walls of Madera Cañon and Sierra Negra, this major-significance watershed delivers seasonal runoff with the timing, infiltration, and sediment regime that downstream irrigation and riparian woodland depend on.

• Continuous Elevational Mosaic from Greasewood Flat to Mixed Conifer: The roadless condition preserves an unbroken sequence of biotic communities — Intermountain Greasewood Flat, Intermountain Salt Desert Scrub, Great Basin Big Sagebrush Shrubland, and Intermountain Semi-Desert Shrub-Steppe on the lower benches; Colorado Plateau and Southern Rockies Pinyon-Juniper Woodland and Southern Rockies Juniper Woodland on the mid-slopes; Rocky Mountain Gambel Oak Shrubland and Southern Rockies Ponderosa Pine Woodland and Savanna above; and Southern Rockies Mixed Conifer Forest with small openings of Northern Rockies Subalpine Grassland at the rim. This intact gradient gives shrub-steppe and woodland species room to track drought and temperature shifts and supports the cavity-nesting, seed-caching, and predator-prey relationships that depend on adjacency among these communities.

• Riparian Corridor and Pinyon-Juniper Stand Integrity: Rocky Mountain Foothill Streamside Woodland threads the arroyos, holding narrowleaf willow and the only reliably mesic vegetation in the basin. Unroaded pinyon-juniper stands — at 23% combined extent the dominant woodland community — retain the older, cone-bearing pinyon pine that supports the entire pinyon-jay seed-dispersal economy and the cavities used by Lewis's woodpecker.

Potential Effects of Road Construction

• Arroyo-Channel Sedimentation and Spring Hydrology Disruption: Road cuts on the steep, fine-textured slopes of Sierra Negra and Madera Cañon would intercept shallow groundwater, dewater seeps such as Alamittos Spring and Ojito Sastras, and shed sediment into Arroyo Hondo, Arroyo del Cerrito Negro, and the other named drainages. Once an arroyo has been incised by concentrated road runoff, the channel cuts downward and the adjacent floodplain dewaters — converting riparian streamside woodland to upland shrubland in a process that does not reverse on management timescales.

• Invasive Annual Grasses in Shrubland and Pinyon-Juniper Communities: Road corridors are the documented vector for cheatgrass and other annual bromes into Intermountain Semi-Desert Shrub-Steppe, Great Basin Big Sagebrush Shrubland, and pinyon-juniper woodland. Once established, these annual grasses carry fire through systems that historically experienced infrequent low-intensity burns, converting open woodland and shrubland to annual grassland and eliminating the older pinyon canopy that pinyon jay and other woodland obligates require.

• Fragmentation of the Elevational Gradient and Old-Stand Pinyon-Juniper: A road network would sever the continuous ascent from greasewood flat to mixed-conifer forest, eliminating climate-driven range shifts and exposing the previously closed-canopy interior of pinyon-juniper stands to firewood cutting and edge effects. Older pinyon pines reach cone-bearing maturity over decades to centuries; once these stands are fragmented and harvested at the road network, the seed economy supporting jay, woodpecker, and small-mammal communities cannot be restored within the same management horizon.

The Sierra Negra Rare II Study Area covers 9,470 acres on the El Rito Ranger District of the Carson National Forest. Recreation here is entirely dispersed — the area has no formally verified trails, no developed trailheads, and no campgrounds inside its boundary. Use is on foot, cross-country, beginning from perimeter Forest Service roads and the public-land edges of the El Rito country. Visitors should reference current Motor Vehicle Use Maps and El Rito Ranger District contacts before entering.

Hunting is the most consistent active use. New Mexico Department of Game and Fish manages general-season big-game hunts that include the Carson NF; the Sierra Negra and Madera Cañon country provides cover for mule deer in the Southern Rockies Ponderosa Pine Woodland and Rocky Mountain Gambel Oak Shrubland of the mid- and upper slopes, and for small game and upland birds in the pinyon-juniper and shrub-steppe communities below. All hunting is on foot from perimeter access; state regulations, licensing, and unit-specific hunt codes apply.

Birding rewards walkers who work the ecotones. The pinyon-juniper woodland communities support curve-billed thrasher (Toxostoma curvirostre) along edges and Steller's jay (Cyanocitta stelleri) in the canopy. Cassin's finch (Haemorhous cassinii) and Townsend's solitaire (Myadestes townsendi) call from mid-slope mixed-conifer transitions. Lewis's woodpecker (Melanerpes lewis) works ponderosa snags, broad-tailed hummingbird (Selasphorus platycercus) and rufous hummingbird (Selasphorus rufus) take paintbrush along the arroyos, and Virginia's warbler (Leiothlypis virginiae) sings from Gambel oak. Cooper's hawk (Astur cooperii) and golden eagle (Aquila chrysaetos) hunt the open country. For comparative species inventories before or after a visit, eight active eBird hotspots lie within 24 km, including Ghost Ranch (184 species), the Bosque River Loop Trail at Ojo Caliente (173 species), the Rio Chama Wild and Scenic River (166 species), and the Abiquiu Lake Boat Ramp Area (154 species).

Reptile and amphibian observation is a quieter use of the area. Eastern collared lizard (Crotaphytus collaris) basks on warm rock outcrops in the shrub-steppe, plateau striped whiptail (Aspidoscelis velox) hunts in the open shrubland, gopher snake (Pituophis catenifer) crosses the trails of the lower benches, and Woodhouse's toad (Anaxyrus woodhousii) emerges along the wetter arroyo reaches and at Alamittos Spring and Ojito Sastras after monsoon storms.

Fishing is not supported in this area; the Outlet El Rito headwaters and the named arroyos — Arroyo Hondo, Arroyo de Soldados, Arroyo las Tunas, Arroyo del Cerrito Negro, Arroyo del Perro, and Arroyo del Perro del Oeste — carry seasonal flow only, and the springs at Alamittos and Ojito Sastras are low-volume seeps rather than fishable water.

Photography concentrates on the landscape transitions: the dry expanse of greasewood flat and big sagebrush shrubland in the lower basins; the open pinyon-juniper canopy on the mid-slopes, with two-needle pinyon pine (Pinus edulis) framing the arroyos; gambel oak in fall along the upper benches; and the high ground of Sierra Negra and the rim of Madera Cañon. Apache-plume (Fallugia paradoxa), scarlet hedgehog cactus (Echinocereus coccineus), and Colorado four-o'clock (Mirabilis multiflora) provide foreground subjects in season.

Every one of these uses depends on the absence of roads inside the area. Cross-country foot hunting depends on cover and quiet; bird and reptile observation depends on intact pinyon-juniper canopy and undisturbed shrub-steppe; spring hydrology at Alamittos Spring and Ojito Sastras depends on undisrupted shallow groundwater; and the long sightlines from Sierra Negra and Madera Cañon depend on a landscape that has not been cut by linear corridors.