Forests are among the most majestic and vital ecosystems in the United States, covering vast expanses and supporting incredible biodiversity.  The largest forests in the country are not only ecological powerhouses but also places of profound beauty, offering countless opportunities for recreation, reflection, and discovery.  Each forest has its own unique history, from ancient trees that predate human civilizations to lands that have shaped American history and culture.  Here are the top 10 largest forests in the United States, ranked by size, showcasing their immense scale and the stories they hold.

#1: Tongass National Forest – 16.7 Million Acres

Located in southeastern Alaska, Tongass National Forest is the largest forest in the United States, spanning 16.7 million acres.  This temperate rainforest is a wonderland of ancient trees, fjords, and glaciers, home to an array of wildlife including bears, bald eagles, and salmon.  Tongass has been a cornerstone of the region’s culture, providing resources for Native Alaskan tribes for thousands of years.  The forest is also vital for combating climate change, as its old-growth trees store immense amounts of carbon.  Its scenic landscapes attract nature enthusiasts and adventure seekers alike.

#2: Chugach National Forest – 6.9 Million Acres

Chugach National Forest, also located in Alaska, covers 6.9 million acres of rugged wilderness, including coastal rainforests, glaciers, and rivers.  This forest is a haven for outdoor activities such as kayaking, fishing, and hiking.  Unique features like the Copper River Delta and Prince William Sound make it a hotspot for birdwatchers and wildlife enthusiasts.  The forest’s history includes its use as a resource by indigenous peoples and its role in conservation efforts following the Exxon Valdez oil spill.

#3: Bridger-Teton National Forest – 3.4 Million Acres

Situated in western Wyoming, Bridger-Teton National Forest spans 3.4 million acres of pristine wilderness, including parts of the Greater Yellowstone Ecosystem.  Known for its towering mountains, clear alpine lakes, and abundant wildlife, the forest is a paradise for backcountry enthusiasts.  Historical anecdotes include its role in early fur trapping expeditions and its significance to Native American tribes.

#4: Humboldt-Toiyabe National Forest – 6.3 Million Acres

Humboldt-Toiyabe National Forest, which stretches across Nevada and parts of California, covers 6.3 million acres, making it the largest national forest outside of Alaska.  The forest features a diverse range of landscapes, from desert basins to lush alpine meadows.  The forest is named after explorer Alexander von Humboldt and the Toiyabe Range, reflecting its rich historical and geographical significance.

#5: Salmon-Challis National Forest – 4.3 Million Acres

Located in central Idaho, Salmon-Challis National Forest encompasses 4.3 million acres of rugged terrain, including the Frank Church-River of No Return Wilderness, one of the largest protected areas in the U.S.  The forest’s rivers are legendary among whitewater rafters, and its peaks attract climbers and hikers.  The region has a storied history of mining and early exploration.

#6: Gila National Forest – 3.3 Million Acres

Gila National Forest in New Mexico spans 3.3 million acres and is home to the Gila Wilderness, the first designated wilderness area in the United States.  Known for its striking cliffs, deep canyons, and archaeological sites, the forest has a rich cultural history, including connections to the Apache leader Geronimo.  Its diverse terrain offers something for every adventurer.

#7: Tonto National Forest – 2.9 Million Acres

Tonto National Forest in Arizona covers 2.9 million acres, blending desert landscapes with lush riparian areas.  The Salt River and Verde River provide critical water sources and recreational opportunities.  Tonto’s history includes ancient cliff dwellings of the Salado people, as well as its role in modern water management.

#8: Pisgah National Forest – 500,000 Acres

Pisgah National Forest in North Carolina is smaller than others on this list but holds a significant place in history as the birthplace of American forestry.  Spanning 500,000 acres, it features dense hardwood forests, waterfalls, and the iconic Blue Ridge Parkway.  The forest’s establishment is tied to the vision of conservationist George Vanderbilt and forester Gifford Pinchot.

#9: Superior National Forest – 3.9 Million Acres

Located in Minnesota, Superior National Forest spans 3.9 million acres, including the famous Boundary Waters Canoe Area Wilderness.  Its pristine lakes and boreal forests are a haven for paddlers, anglers, and birdwatchers.  The forest is also steeped in cultural history, with Native American tribes having relied on its resources for centuries.

#10: Ouachita National Forest – 1.8 Million Acres

The Ouachita National Forest in Arkansas and Oklahoma covers 1.8 million acres of rolling hills, pine forests, and sparkling lakes.  As the oldest national forest in the southern U.S., it has a rich history of timber production and conservation.  Its scenic trails and waterways make it a popular destination for outdoor enthusiasts.

The largest forests in the United States are more than just vast stretches of trees; they are ecosystems teeming with life, cultural landmarks, and reservoirs of history.  From the rainforests of Alaska to the desert landscapes of Arizona, these forests represent the incredible diversity of the American landscape.  Protecting and exploring these natural treasures ensures their legacy for future generations, reminding us of our deep connection to the natural world.