Historical Earthquake Records and Recorded Seismic Activity for Redwood National and State Parks

Six Rivers National Forest: Exploring Protected River Valleys and Mountain Terrain in California

A regional protected area spanning California river systems

Six Rivers National Forest defines much of the rugged landscape in northwestern California. Named for the six major river drainages within its borders, the area features a unique combination of coastal forests, deep river canyons, and high-country ridges that offer significant insight into the region's broader geographic and ecological character.

Area

3,875.2 km²

Established

1947

Relief

Mountain

Climate

Mediterranean

Smith River National Recreation Area: Mapping the Klamath Mountain Protected Landscape

Watershed geography and rugged mountain terrain in northwestern California

Located in the heart of the Klamath Mountains, Smith River National Recreation Area represents a critical protected watershed in northern California. The area is defined by its deep, forested canyons and the clean, wild waters of the Smith River, which serve as a primary link between coastal redwood ecosystems and mountainous inland terrain. Users can study the park boundaries and regional landscape characteristics that sustain this remote environment.

Area

1,235 km²

Established

1990

Relief

Mountain

Climate

Mediterranean

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

Kalmiopsis Wilderness: Mapping the Protected Landscapes and Geology of Southwestern Oregon

Botanical richness and dramatic canyon terrain in the Klamath Mountains

Kalmiopsis Wilderness preserves a dramatic landscape of steep ridges and river-cut valleys across 180,000 acres in southwestern Oregon. Known for its distinct serpentine soils and high botanical diversity, the wilderness area offers a look at complex mountain ecology and significant Wild and Scenic River headwaters within the Rogue River-Siskiyou National Forest.

Area

727.44 km²

Established

1964

IUCN

Ib

Relief

Mountain

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

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

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

Red Buttes Wilderness: Mapping the Protected Mountain Geography of the Siskiyou Range

A rugged wilderness reserve straddling California and Oregon

Red Buttes Wilderness preserves a complex mountainous terrain shaped by ancient metamorphic rocks and glacial history. The area features high ridgelines, alpine lakes, and specialized botanical habitats, providing a vital window into the ecological and geological diversity of the broader Klamath and Siskiyou mountain landscapes.

Area

80.7 km²

Established

1984

IUCN

Ib

Relief

Mountain