Historical Catalogue of Recorded Earthquakes Associated with Mount Shasta Wilderness

Shasta, Trinity National Forest: Mapping the Protected Landscapes of Northern California

Volcanic peaks, expansive reservoirs, and rugged mountain wilderness

Spanning over two million acres, Shasta, Trinity National Forest represents a major protected landscape in Northern California. The geography includes the iconic Mount Shasta volcano and the complex shoreline of Shasta Lake, while hosting expansive wilderness areas and diverse terrain ranging from oak-forested foothills to alpine meadows.

Area

8,942.87 km²

Established

1954

Relief

Mountain

Climate

Temperate

Butte Valley National Grassland: Geographic Overview and Protected Landscape Mapping

High-desert sagebrush steppe in Northern California

Butte Valley National Grassland is a singular protected landscape in northern California, known for its expansive sagebrush steppe and dry lakebed terrain. Centered in the Klamath River basin, the grassland provides an essential high-desert habitat framed by the dramatic volcanic presence of the Cascade Range and Mount Shasta. This atlas entry details the geography, soil composition, and mountain-framed boundaries of this unique protected area.

Area

74.56 km²

Established

1991

Relief

Upland

Climate

Temperate

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

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

Marble Mountain Wilderness: Exploring Protected Mountain Landscapes in Northern California

Klamath Mountains Wilderness and Alpine Geography

Spanning hundreds of thousands of acres, Marble Mountain Wilderness offers a dense concentration of subalpine fir, deep glacial lakes, and steep drainage basins. This northern California protected landscape provides an atlas of rugged ridges and marble-toned peaks that represent one of the most ecologically diverse backcountry areas in the region.

Area

978.3 km²

Established

1964

IUCN

Ib

Relief

Mountain

Rogue River, Siskiyou National Forest: Mapped Geography and Protected Area Overview

Tracing volcanic peaks and river-carved mountain terrain in Oregon

Spanning nearly 7,300 square kilometers, the Rogue River, Siskiyou National Forest acts as a crucial ecological anchor in the Pacific Northwest. This overview details its unique mountain geography, the extensive wilderness tracts within its boundaries, and the river systems that define its mountainous character.

Area

6,973.46 km²

Established

2004

Visitors

915K annual

Relief

Mountain

Whiskeytown, Shasta, Trinity National Recreation Area: Geographic and Protected Landscape Overview

Mapped terrain across northern California reservoir units

Investigate the environmental character of Whiskeytown, Shasta, Trinity National Recreation Area, spanning from the expansive waters of Shasta Lake to the forested ridges of the Whiskeytown unit. This atlas entry details the interplay between large-scale reservoir management, riparian habitats, and the transition from Mediterranean chaparral to high-elevation conifer forests in California.

Area

99,588 km²

Established

1965

IUCN

V

Visitors

1.5M annual

Klamath National Forest; Protected Landscape Geography and Mapped Wilderness Boundaries

Diverse mountain terrain in Northern California

Klamath National Forest represents a significant protected area in Northern California, encompassing a vast, rugged landscape that bridges the Klamath Mountains and the Cascade Range. Its terrain is characterized by deeply incised river valleys, exposed rocky summits, and an intricate mosaic of coniferous forests. This geographic detail provides essential context on the forest's role as a major site for wilderness protection and ecological study in the Pacific Northwest.

Area

7,033 km²

Established

1905

Relief

Mountain

Climate

Temperate