Historical Earthquake Records and Seismic Activity for Rogue-Umpqua Divide Wilderness

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

Crater Lake National Park: Oregon National Park Atlas of Volcanic Landscapes

Explore mapped boundaries and unique caldera geography.

Crater Lake National Park represents a significant protected area within Oregon, defined by the dramatic volcanic caldera it contains. This national park is celebrated for its exceptionally deep, clear blue lake, formed by the collapse of Mount Mazama, offering a unique subject for geographic and landscape study. Users can explore its mapped boundaries and understand its position within the broader atlas of protected lands and mountainous terrain of the Cascade Range.

Area

741.48 km²

Established

1902

IUCN

II

Visitors

527K annual

Umpqua National Forest: Mapping the Protected Landscapes and Volcanic Terrain of Southern Oregon

A regional geography of the southern Cascade Range

Umpqua National Forest protects a critical expanse of southern Oregon, rising from river-carved timbered valleys to the high volcanic peaks of the Cascade Range. This atlas record details the forest's significant volcanic geology, sprawling old-growth habitats, and the Wild and Scenic North Umpqua River system. Explore the intricate boundaries of its wilderness areas and its relationship to the surrounding regional terrain through detailed geographic mapping and landscape analysis.

Area

3,978.58 km²

Established

1907

Visitors

799K annual

Relief

Mountain

Mount Thielsen Wilderness: Protected Volcanic Terrain and Glacial Landscapes in Oregon

Southern Cascade Range mountain and forest geography

Mount Thielsen Wilderness offers a compact yet dramatic study of southern Cascade topography. Dominated by its signature lightning-struck volcanic peak, the area encompasses a complex network of glacial cirques, deep valleys, and high-altitude forest zones. This map-rich entry point provides a closer look at the protected boundaries and natural geological features that define this significant segment of Oregon wilderness.

Area

223 km²

Established

1984

IUCN

Ib

Relief

Mountain

Willamette National Forest: Geography and Protected Landscapes of the Central Oregon Cascades

Mapped terrain, old-growth forests, and protected wilderness boundaries.

Explore the expansive territory of Willamette National Forest, a primary protected area extending over 100 miles along Oregon's Cascade Range. This region features volcanic peaks exceeding 10,000 feet, extensive old-growth Douglas-fir stands, and a dense network of Wild and Scenic rivers, providing a detailed look at the geographic character and ecological heritage of the Pacific Northwest.

Area

6,790.75 km²

Established

1933

Visitors

1.7M annual

Relief

Mountain

Mountain Lakes Wilderness: Geographic Atlas of Oregon's Glacial Volcanic Reserve

Mapping the volcanic cirques and square boundaries of the southern Cascades.

Mountain Lakes Wilderness serves as a primary geographic anchor in the southern Cascades, where shield volcanoes meet glacially carved basins. This protected area contains over twenty lakes situated in high-altitude cirques near the summits of volcanic peaks like Aspen Butte. The area is defined by its distinctive square survey-township boundary, providing a clear footprint of wilderness conservation within the larger Fremont-Winema National Forest terrain.

Area

93 km²

Established

1964

IUCN

Ib

Relief

Mountain

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

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