Payette National Forest Historical Earthquake Records and Seismic Data Catalogue

Frank Church, River of No Return Wilderness: Idaho Protected Mountain and River Landscapes

Discover massive roadless geography and river-carved mountain terrain.

Spanning over 2.3 million acres in central Idaho, the Frank Church, River of No Return Wilderness represents one of the most significant intact roadless landscapes in the lower 48 states. This protected area features a complex mosaic of coniferous forests, high-altitude alpine ridges, and the steep, jagged canyons of the Salmon River, creating a unique geographic profile for regional exploration.

Area

9,578.21 km²

Established

1980

IUCN

Ib

Relief

Mountain

Hells Canyon National Recreation Area: Geologic Boundaries and Snake River Corridor Atlas

Deep canyon terrain and archaeological heritage in the American Northwest

This protected landscape encompasses the profound depth of the Snake River gorge, featuring rugged basalt cliffs and diverse forested uplands. The area serves as a significant intersection of natural history and ancient cultural presence, providing a detailed look at the topographic complexity defining the Oregon and Idaho boundary region.

Area

2,641 km²

Established

1975

Relief

Mountain

Climate

Temperate

Salmon, Challis National Forest: Geography and Protected Land Map in Central Idaho

Extensive alpine ridges and wild river corridors

Spanning over 4.2 million acres, Salmon, Challis National Forest is a foundational protected landscape in Idaho. This area includes the highest peaks in the state, such as Borah Peak, and holds the majority of the Frank Church, River of No Return Wilderness. Utilize this atlas resource to examine the intricate mountain topography, expansive river systems, and the contiguous wild corridors that define this significant portion of the northern Rockies.

Area

17,142.2 km²

Established

1908

Relief

Mountain

Climate

Temperate

Wallowa-Whitman National Forest: A Geographic Overview of Northeastern Oregon Landscapes

Alpine wilderness, mountain ranges, and deep river gorges.

Wallowa-Whitman National Forest protects a vast, varied landscape of granite peaks, alpine meadows, and forested river canyons. This detailed overview covers the geographic significance of the Wallowa and Elkhorn mountains, the Hells Canyon corridor, and the surrounding wilderness regions within Oregon.

Area

9,682 km²

Established

1905

Visitors

505K annual

Relief

Mountain

Eagle Cap Wilderness: Map and Protected Area Overview in Northeastern Oregon

High elevation terrain, glacial valleys, and mountain ecosystems

Spanning over 350,000 acres, Eagle Cap Wilderness defines the high-altitude geography of the Wallowa Mountains. This protected area is characterized by sharp granite ridges, more than 60 named alpine lakes, and deeply carved U shaped glacial valleys. It acts as a primary water source for the region, hosting the headwaters of several major rivers while supporting diverse wildlife populations in a preserved backcountry environment.

Area

1,462.72 km²

Established

1940

IUCN

Ib

Relief

Mountain

Sawtooth National Forest: Geographic Overview and Protected Mountain Boundaries

Central Idaho mountain systems and wilderness corridors

Spanning over two million acres, Sawtooth National Forest defines the heart of the Rocky Mountains in Idaho. This protected landscape contains a complex network of glacial basins, alpine lakes, and varied ecosystems ranging from arid sagebrush foothills to high-altitude peaks. Explore the internal boundaries, drainage systems, and structural geography of this significant wilderness area.

Area

8,540.52 km²

Established

1905

Visitors

1.2M annual

Relief

Mountain

Sawtooth National Recreation Area: Mapping the Protected Landscape of Central Idaho

A vast mountain wilderness of granite peaks and glacier-carved lakes.

The Sawtooth National Recreation Area encompasses a quintessential northern Rocky Mountain terrain defined by the dramatic Sawtooth, White Cloud, and Boulder ranges. This protected landscape preserves over 700,000 acres of high-elevation wilderness, ranging from jagged granite arêtes to the broad, U-shaped Sawtooth Valley, serving as a critical hydrologic anchor for the rivers of the American West.

Area

2,957.7 km²

Established

1972

Relief

Mountain

Climate

Alpine

Malheur National Forest: Exploring Oregon's Vast Protected Mountain and Desert Landscape

A geographic study of the Blue Mountains and high desert terrain

Spanning over 1.4 million acres, Malheur National Forest represents a complex protected landscape in eastern Oregon. Its geography is defined by a central spine of the Strawberry Mountains, creating a transition zone between arid high desert ecosystems and dense coniferous forests. Known for large wilderness areas and extensive old growth stands, this forest serves as a vital point for understanding the interplay between topographic elevation and regional climate in the Pacific Northwest.

Area

5,929.81 km²

Established

1908

Visitors

242K annual

Relief

Mountain