Recorded Earthquake History and Seismic Activity Records for Plumas National Forest

Lassen National Forest: Mapped Geography and Protected Landscapes of Northern California

Volcanic terrain and expansive old growth ecosystems

Lassen National Forest represents a vast protected landscape in Northern California, defined by its severe volcanic geology and resilient conifer forests. This atlas entry provides essential geographic context regarding the forest boundaries, the volcanic rim of Mount Tehama, and the intricate river systems shaping the region. Explore the terrain, from accessible lava tubes to the wilderness areas preserved within this significant mountain corridor.

Area

4,331.53 km²

Established

1905

Relief

Mountain

Climate

Temperate

Tahoe National Forest: Exploring Protected Mountain Landscapes in the California Sierra Nevada

An atlas of granite river canyons and alpine ridge terrain

Tahoe National Forest defines a critical segment of the western Sierra Nevada, containing granite river canyons, numerous reservoirs, and summits reaching above 9,000 feet. This protected landscape acts as a vital headwater for California foothill communities and Nevada, hosting significant natural features like the Placer County Big Trees Grove and segments of the Pacific Crest Trail.

Area

3,526.82 km²

Established

1899

Relief

Mountain

Climate

Mediterranean

Humboldt, Toiyabe National Forest: Protected Landscape and Regional Mountain Geography

A vast network of Nevada mountain ranges and alpine wilderness

Humboldt, Toiyabe National Forest serves as a defining public land entity across Nevada and eastern California. As the largest national forest in the contiguous United States, it preserves a striking collection of isolated mountain ranges, including the Ruby Mountains and the rugged Jarbidge wilderness, within a broader basin-and-range landscape. Examine the boundaries and terrain that characterize this complex, high-desert ecosystem.

Area

25,454 km²

Established

1908

Relief

Mountain

Access

Easy access

Ishi Wilderness Wildlife Reserve: Mapping the Volcanic Canyons of the Cascade Foothills

Geographic atlas of protected northern California wilderness and cultural landscapes.

Ishi Wilderness represents a crucial protected area in northern California, where volcanic geology meets a deep-rooted cultural history. Explore the mapped ridgelines, river canyons, and diverse oak woodland habitats that define this unique wildlife reserve and its role within the Cascade foothills.

Area

167.29 km²

Established

1984

IUCN

Ib

Relief

Mountain

Lassen Volcanic National Park: Protected Landscape Identity and Geographic Context

Discover the mapped boundaries and natural terrain of this California national park.

Gain a structured understanding of Lassen Volcanic National Park as a protected landscape. This detail page provides essential geographic context, focusing on the park's mapped boundaries and its specific terrain characteristics within California. It is designed for users seeking detailed information about the park's protected status and its placement within the broader atlas of natural areas, emphasizing its unique geographic identity and conservation significance.

Area

430.8 km²

Established

1916

IUCN

II

Visitors

504.8K annual

Mount Rose Wilderness: Protected Landscape and Regional Geography in Northwestern Nevada

Carson Range alpine terrain and ecological transition mapping

Mount Rose Wilderness represents a significant protected area in the Carson Range, where 31,223 acres of terrain transition from the forested, subalpine slopes of the Sierra Nevada to the drier, sage-dominated Great Basin. The mapped landscape includes high granite peaks and meadows, offering a clear view of the complex environmental gradients that define this unique section of the American West.

Area

126.35 km²

Established

1989

Relief

Mountain

Climate

Temperate

Modoc National Forest: Protected Landscape and Warner Mountains Geography

High desert volcanic terrain in northeastern California

Modoc National Forest encompasses a massive expanse of volcanic plateaus and rugged mountain ridges in the northeastern corner of California. This protected area offers significant geographic variety, transitioning from arid sagebrush basins to lush, high-elevation conifer forests. It serves as a vital natural landscape, home to the South Warner Wilderness and large stands of old-growth timber, reflecting the unique geologic history of the regional lava flows.

Area

6,695.09 km²

Established

1904

Relief

Mountain

Access

Moderate access

Mendocino National Forest: Mapping California's Remote Protected Mountain Landscape

Examining wilderness boundaries and rugged coastal terrain

Mendocino National Forest serves as a significant protected area in California, known for being the only national forest in the state without major paved access. Its terrain spans 913,000 acres of mountain peaks, deep river canyons, and old-growth conifer forests. Home to the unique tule elk population at Lake Pillsbury, this landscape provides a rare example of wilderness isolation, complex geothermal features, and rugged, largely untouched northern coastal topography.

Area

3,696.02 km²

Established

1907

Relief

Mountain

Climate

Mediterranean