Recorded Earthquake History and Seismic Activity Near Joshua Tree National Park

San Bernardino National Forest: Geography and Protected Landscape Atlas

Transverse and Peninsular mountain ranges in California

Spanning over 820,000 acres, San Bernardino National Forest offers a look at one of Southern California's most significant protected landscapes. The forest features seven wilderness areas and a dramatic range of elevation, moving from arid chaparral to old-growth mixed conifer forests. Our geographic mapping traces the unique structure of four intersecting mountain ranges, detailing the terrain from deep canyons to high alpine peaks.

Area

3,333.87 km²

Established

1907

Relief

Mountain

Climate

Mediterranean

Riverside Mountains Wilderness: Mapping the Desert Peaks and Protected Landscapes of California

A rugged desert wildlife reserve within the Lower Colorado River Valley

Riverside Mountains Wilderness features a tightly woven mosaic of dry drainages, rocky slopes, and sheltered canyon pockets. Situated in Riverside County, California, this protected area showcases a striking transition between steep mountain crags and open desert flats, providing a meaningful look at the Sonoran and Colorado Desert ecosystems along the Colorado River corridor.

Area

97.14 km²

Established

1994

Relief

Mountain

Climate

Arid

Fish Creek Mountains Wilderness: Mapping the Rugged Colorado Desert Plateau in California

Exploring desert ridges and ancient shoreline remnants

Fish Creek Mountains Wilderness offers a study in desert geomorphology, rising as an abrupt plateau above the surrounding basin. This Bureau of Land Management protected area contains intricate erosional landforms, including twisting canyons and natural rock tanks sustained by limestone outcrops. These features create a critical desert wildlife habitat that maintains moisture long after seasonal storms, offering a quiet, undisturbed perspective on the broader Imperial County landscape.

Area

86.7 km²

Established

1994

IUCN

Ib

Relief

Mountain

Indian Pass Wilderness: Protected Sonoran Desert Geography and Terrain Mapping

Analyzing desert mountain slopes and riparian corridors in California

Indian Pass Wilderness represents a key protected-area unit where the arid Chocolate Mountains descend into the Lower Colorado River Valley. The area is defined by its dramatic drainage patterns, including Julian Wash, and its role as a transition zone between desert upland and riparian edge, serving as a critical study for understanding southwestern desert geography and protected landscape boundaries.

Area

131.19 km²

Established

1994

IUCN

Ib

Relief

Mountain

Angeles National Forest: Mapped Protected Landscapes and Geographic Terrain in California

Mountain wilderness and Mediterranean watershed geography

Spanning the San Gabriel and Sierra Pelona ranges, Angeles National Forest serves as a dramatic ecological transition zone. This analysis of its protected landscape focuses on the interaction between steep canyons, high peaks, and the distinct chaparral and conifer zones that shape California geography.

Area

2,652.26 km²

Established

1908

Relief

Mountain

Climate

Mediterranean

Little Picacho Wilderness: Exploring the Protected Volcanic Terrain and Desert Geography

A rugged wilderness reserve in southeastern California

Little Picacho Wilderness is a protected desert landscape located along the lower Colorado River corridor. The area is defined by dramatic volcanic ridges, Picacho Peak, and extensive arid desert washes. This wildlife reserve serves as an important refuge for desert bighorn sheep, desert tortoises, and free-roaming wild horse herds, offering a clear window into the rugged geography of the Sonoran Desert.

Area

154.65 km²

Established

1994

IUCN

Ib

Relief

Mountain

Lake Mead National Recreation Area: Desert Reservoir and Protected Landscape Atlas

United States protected geography and reservoir terrain

Spanning the lower Colorado River, Lake Mead National Recreation Area represents a unique convergence of desert ecosystems and large-scale water management. Its geography includes extensive reservoir shorelines, deep canyon corridors, and volcanic basin terrain that provide a foundational look at the arid environments of the American Southwest. The area remains a significant study of how engineered water features alter and interact with complex desert landscapes.

Area

6,053.31 km²

Established

1936

IUCN

V

Visitors

6.4M annual

Mount Nutt Wilderness: Mapping the Volcanic Canyons and Desert Landscapes of Arizona

A protected wilderness area in the central Black Mountains

Mount Nutt Wilderness offers a dramatic look at high desert topography, characterized by fortress-like volcanic formations and deeply incised canyons. This protected area in northwestern Arizona provides essential habitat for desert bighorn sheep while showcasing the contrast between sun-baked mesas and lush, spring-fed riparian zones.

Area

114 km²

Established

1990

IUCN

Ib

Water

Minor water