Historical Earthquake Records and Seismic Activity Near Gateway Arch National Park

Mark Twain National Forest: Geography and Protected Area Atlas of Southern Missouri

Mapping the karst terrain and ancient ridges of the Ozark Highlands

Mark Twain National Forest represents a sprawling conservation area within the Missouri Ozark Highlands. Its geography is defined by volcanic mountain remnants, rocky glades, and significant river corridors like the Eleven Point National Scenic River. This record provides insight into the forest's complex mapped boundaries, seven designated wilderness areas, and the distinctive karst geology that characterizes this unique American landscape.

Area

6,037.3 km²

Established

1939

Relief

Upland

Climate

Temperate

Shawnee National Forest: Exploring the Protected Landscapes of the Illinois Shawnee Hills

Mapped sandstone formations and glacial terrain in southern Illinois

Spanning nearly 289,000 hectares, Shawnee National Forest is the largest body of public land in Illinois. The area is defined by its dramatic sandstone bluffs, deep canyons, and seven designated wilderness areas that provide a rare rugged topography within the American Midwest. Explore the complex geography of this forest, from its glacial-sculpted river watersheds to its diverse hardwood habitats and historic reforestation sites.

Area

2,017.83 km²

Established

1933

Relief

Upland

Climate

Temperate

Rockpile Mountain Wilderness: Mapping the Rugged Ridge Landscapes of the Southeastern Ozarks

A federally protected wilderness within Missouri's Mark Twain National Forest

Explore the distinct geography of Rockpile Mountain Wilderness, where a steep granite ridge runs from Little Grass Mountain toward the national forest boundary. This protected area features unique cultural history in the form of an Indigenous stone cairn and showcases the eroded, rocky character of the eastern Ozark highlands. Use this resource to understand the boundary and terrain of this significant wilderness tract.

Area

17.15 km²

Established

1980

IUCN

Ib

Relief

Mountain

Mingo Wilderness: Missouri Protected Wildlife Reserve and Wetland Geography

Primitive bottomland forest and swamp landscape

Mingo Wilderness encompasses 8,000 acres of protected bottomland hardwood forest and cypress-tupelo swamp in southeastern Missouri. As a federally designated wilderness area embedded within a national wildlife refuge, it provides a quiet, primitive habitat characterized by slow-moving creek corridors and varied seasonal wetlands.

Area

32 km²

Established

1976

IUCN

Ib

Relief

Lowland

Lusk Creek Wilderness: An Atlas of Protected Sandstone Canyons and Forests in Southern Illinois

Mapping rugged wilderness terrain and forest ecological recovery.

Lusk Creek Wilderness serves as a key protected landscape in southern Illinois, featuring extensive sandstone canyon systems and dense hardwood woodland. This area offers a unique look at the geological and forested character of the Shawnee region, documented through its boundaries, elevation changes, and natural landmarks. Use this geographic entry to examine the rugged, roadless character of the state largest wilderness designation and its place within the wider regional drainage system.

Area

25.47 km²

Established

1990

IUCN

Ib

Relief

Upland

Garden of the Gods Wilderness: A Protected Sandstone Plateau in Southern Illinois

Explore geologic boundaries, sandstone hoodoos, and forested wilderness terrain

Garden of the Gods Wilderness represents a critical protected area within the Shawnee National Forest, notable for its unglaciated sandstone geography. This 3,318-acre wilderness offers an intimate view of ancient carboniferous rock formations, including prominent hoodoos and clifftop overlooks that provide expansive sightlines across the southern Illinois landscape.

Area

13.43 km²

Established

1990

Relief

Upland

Climate

Temperate

Irish Wilderness: Missouri Ozark Protected Area and Karst Landscape Atlas

Federally protected wilderness in the Eleven Point River landscape

Spanning the rugged terrain of the Missouri Ozarks, Irish Wilderness is a federally protected area known for its distinct karst geography. Visitors can study the network of caves, sinkholes, and springs that define the local environment, alongside historical remnants of frontier settlement. The area serves as a primary example of wilderness preservation within the Mark Twain National Forest, balancing sensitive cave ecosystems with forested ridge landscapes.

Area

65.87 km²

Established

1984

IUCN

Ib

Relief

Upland

Land Between the Lakes National Recreation Area: Mapped Geography and Protected Landscapes

An inland peninsula preserved between two major river reservoirs.

Land Between the Lakes National Recreation Area occupies a distinct narrow land bridge between Kentucky Lake and Lake Barkley. This protected landscape contains a dense mix of forested ridges, stream valleys, and managed wildlife prairies. The area is integral to the lower Ohio River Valley geography, showcasing the results of long-term watershed management and large-scale ecological restoration within the United States.

Area

693.1 km²

Established

1963

Visitors

2M annual

Relief

Lowland