Historical Earthquake Records and Seismic Activity Associated with Wallowa-Whitman National Forest

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

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

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

Payette National Forest: Geographic Overview of Idaho's Rugged Mountain Wilderness

Protected granite landscapes and glacial basin geography

Encompassing a vast portion of central Idaho, Payette National Forest represents a significant protected wilderness corridor. The forest geography transitions from granite-based alpine peaks and deep river gorges to dense coniferous slopes, providing essential habitat and extensive trail connectivity throughout the Northern Rockies.

Area

9,419.55 km²

Established

1944

Relief

Mountain

Access

Access unknown

Umatilla National Forest: A Comprehensive Atlas of Blue Mountains Protected Landscapes

Explore mountain terrain, wilderness areas, and river-carved geography

Spanning over one million acres, Umatilla National Forest encompasses a complex array of river-cut canyons, high-country ridges, and substantial old-growth woodlands. This protected landscape offers a deep look into the ecological and physical character of the Blue Mountains, from the remote reaches of the Wenaha-Tucannon Wilderness to the headwaters of the Umatilla River.

Area

5,694 km²

Established

1908

Visitors

703K annual

Relief

Mountain

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

Ochoco National Forest: Mapping the Rugged Canyons and High Desert of Central Oregon

A vast protected area defined by rimrock plateaus and pine-forest watersheds.

Located in the heart of the Ochoco Mountains, this protected landscape offers a study in ecological contrast. From its dense ponderosa pine groves to the exposed volcanic ridges of the high desert, the forest acts as a critical habitat corridor for mule deer and elk, while protecting the headwaters of the North Fork Crooked River within a diverse, multi-terrain framework.

Area

3,444.01 km²

Established

1911

Visitors

575K annual

Relief

Mountain

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