Sequoia National Park: Land of the Giant Trees

Sequoia National Park, established on September 25, 1890 — making it America's second-oldest national park after Yellowstone — protects 404,064 acres of the southern Sierra Nevada in California. The park is home to the giant sequoia (Sequoiadendron giganteum), the largest tree species on Earth by volume. The General Sherman Tree, standing 275 feet tall with a circumference of 102 feet at its base, is the largest known living single-stem tree on the planet.

Introduction

Beyond its famous trees, the park encompasses dramatic alpine landscapes ranging from 1,370 feet in the western foothills to 14,494 feet atop Mount Whitney — the highest point in the contiguous United States. Approximately 1.2 million visitors annually explore the park's giant sequoia groves, underground marble caves, deep river canyons, and over 800 miles of trails traversing some of the most rugged terrain in the Sierra Nevada.

Giant Sequoias

• General Sherman: 275 ft tall, 52,508 cubic feet of wood — largest tree on Earth
• Trunk Circumference: 102 feet at base
• Age of Oldest Sequoias: Over 3,200 years
• Groves in the Park: Over 30 giant sequoia groves

Giant sequoias are the largest living organisms on Earth by volume. General Sherman, the park's most famous resident, contains an estimated 52,508 cubic feet of wood and adds approximately 40 cubic feet of new growth each year — equivalent to the volume of a 60-foot-tall tree. The tree is estimated to be roughly 2,200 years old, meaning it was already ancient when the Roman Empire was at its height.

The park protects over 30 groves of giant sequoias, including the Giant Forest, which contains five of the ten largest trees in the world. Giant sequoias require specific conditions to thrive: elevations between 5,000 and 7,000 feet, deep well-drained soil, and periodic fire to clear competing vegetation and open their cones. Fire is essential to the sequoia lifecycle — their bark can be up to 3 feet thick, providing remarkable fire resistance, and heat from fires opens their small cones to release seeds.

Caves & Underground

• Crystal Cave: A marble dissolution cave open for tours
• Cave Length: Over 3.4 miles of mapped passages
• Cave Formations: Stalactites, stalagmites, columns, flowstone
• Other Caves: Over 275 known caves in the park

Sequoia National Park contains over 275 known caves, more than any other national park in the United States. Crystal Cave, the only one open to the public, was formed over millions of years as water dissolved marble (metamorphosed limestone) along fractures in the rock. The cave features polished marble walls, intricate stalactite and stalagmite formations, and underground streams at a constant temperature of 48°F.

Lilburn Cave, the park's longest cave at over 20 miles of mapped passages, is open only to researchers and is one of the most complex cave systems in California. The caves formed in a belt of metamorphic rock that runs through the western Sierra Nevada, created from ancient seafloor sediments that were transformed by heat and pressure as the mountain range was uplifted.

Landscape & Peaks

• Mount Whitney: 14,494 feet — highest in the contiguous US
• Elevation Range: 1,370 to 14,494 feet
• Major Canyon: Kern River Canyon, over 6,000 feet deep
• Wilderness Area: Over 90% of the park is designated wilderness

The park's terrain spans an extraordinary 13,000 feet of elevation, from oak-covered foothills in the west to alpine peaks and glacial cirques along the Great Western Divide and the Sierra Crest. Mount Whitney, at 14,494 feet, stands on the park's eastern boundary (the summit is technically in the adjacent Inyo National Forest but shares the same ridgeline). The Kern River Canyon cuts over 6,000 feet deep through the park's backcountry.

Over 90% of Sequoia National Park is designated wilderness, making it one of the most wild and inaccessible parks in the system. The backcountry High Sierra Trail, stretching 72 miles from Crescent Meadow to Mount Whitney, is one of the premier backpacking routes in the United States. The trail crosses the Great Western Divide at 10,700 feet and traverses some of the most spectacular alpine scenery in the Sierra Nevada.

Visiting & Activities

• Best Time to Visit: June through September for high country; year-round for sequoias
• Popular Trails: Congress Trail, Moro Rock, Big Trees Trail
• Campgrounds: 7 campgrounds with over 700 sites
• Annual Visitors: Approximately 1.2 million

The General Sherman Tree is accessible via a paved 0.8-mile trail from the parking area. The Congress Trail, a 2-mile paved loop, passes several of the largest sequoias including the President, Chief Sequoyah, and the Senate and House groups. Moro Rock, a granite dome reached by a 400-step staircase carved into the rock, offers panoramic views of the Great Western Divide and the Central Valley.

The Generals Highway connects Sequoia with neighboring Kings Canyon National Park, climbing through sequoia groves and offering stunning views along the way. Mineral King, a remote valley in the southern part of the park reached by a narrow 25-mile mountain road, provides access to stunning alpine hiking and is far less crowded than the Giant Forest area. Winter visitors can snowshoe through the sequoia groves — an unforgettable experience of silence broken only by snow falling from ancient branches.

Key Facts

• General Sherman is the largest known living single-stem tree on Earth at 52,508 cubic feet of wood.
• Sequoia National Park was established in 1890, making it America's second national park.
• The park contains over 275 caves, more than any other national park in the United States.
• Giant sequoia bark can be up to 3 feet thick, providing exceptional fire resistance.
• The park spans a 13,000-foot elevation range from foothills to the highest peak in the lower 48 states.

Fun Facts

• General Sherman adds about 40 cubic feet of new wood each year — the equivalent of a 60-foot-tall tree — making it one of the fastest-growing organisms on Earth.
• Giant sequoia cones are surprisingly small — only 2-3 inches long — yet a single tree can produce 11,000 cones per year, each containing up to 230 seeds.
• The park was created largely through the efforts of a newspaper editor, George Stewart, who campaigned in his Visalia newspaper for the trees' protection.
• Giant sequoias only grow naturally on the western slope of the Sierra Nevada in California — nowhere else on Earth.

Final Thoughts

Sequoia National Park protects trees of almost incomprehensible size and age in a landscape that stretches from gentle foothills to the highest summit in the contiguous United States. Standing at the base of General Sherman, looking up at a living organism that was already centuries old when Julius Caesar walked the Earth, is an experience that fundamentally shifts one's perspective on time, scale, and the resilience of life.