Yellowstone National Park

Overview

Yellowstone National Park represents one of the last intact temperate ecosystems on Earth, preserving a vast volcanic caldera and the world's largest concentration of geothermal features with over 10,000 hydrothermal sites. The park sits atop a massive volcanic hotspot, creating spectacular geysers, hot springs, mudpots, and fumaroles that have fascinated visitors for over 150 years. The iconic Old Faithful geyser erupts approximately every 90 minutes, while the Grand Prismatic Spring displays vivid rainbow colors created by thermophilic bacteria. The park's ecosystem supports 67 species of mammals, including the largest free-roaming bison herd in the United States, reintroduced gray wolves, grizzly bears, elk, and pronghorn. Yellowstone's wildlife viewing opportunities are unparalleled in the continental United States, particularly in the Lamar and Hayden Valleys. The reintroduction of wolves in 1995 has been one of conservation's most successful rewilding projects, restoring ecological balance and providing valuable insights into predator-prey dynamics. Yellowstone's landscape encompasses the dramatic Grand Canyon of the Yellowstone River with its stunning waterfalls, Yellowstone Lake (the largest high-elevation lake in North America), and vast forests of lodgepole pine. The park experiences regular seismic activity with thousands of small earthquakes annually, reminding visitors of the active volcanic system beneath their feet. Elevations range from 5,282 feet at the north entrance to 11,358 feet at Eagle Peak. As a UNESCO World Heritage Site since 1978, Yellowstone serves as a living laboratory for scientific research in geology, ecology, and climate science. The park receives approximately 4 million visitors annually, drawn by its unique combination of geothermal wonders, wildlife abundance, and pristine wilderness. Yellowstone's establishment set a precedent for the national park concept worldwide, inspiring conservation efforts across the globe.

Getting there

The nearest major airports are Bozeman Yellowstone International Airport in Montana (90 miles north) and Jackson Hole Airport in Wyoming (60 miles south). Regional airports include West Yellowstone Airport and Billings Logan International Airport. The park has five entrance stations accessible by road: North Entrance at Gardiner, Montana (via US-89); Northeast Entrance at Cooke City, Montana (via US-212); East Entrance (via US-14/16/20); South Entrance (via US-89/191/287); and West Entrance at West Yellowstone, Montana (via US-20). No public transportation serves the park; private vehicle or tour bus is required.

Best time to visit

April through May and September through October offer fewer crowds with active wildlife during spring calving and fall rut seasons. June through August provides warmest weather, full facility access, and peak visitation. Winter (December through March) offers unique experiences viewing geothermal features surrounded by snow and watching wildlife in valleys, though most roads close except the northern route from Gardiner to Cooke City.

Trails & points of interest

Grand Prismatic Spring Overlook Trail, Uncle Tom's Trail to Lower Yellowstone Falls, Mount Washburn Trail, Fairy Falls Trail, Lamar Valley wildlife watching routes, Mystic Falls Trail, Storm Point Trail along Yellowstone Lake, Lone Star Geyser Trail, and the backcountry Thorofare region. The Grand Loop Road (142 miles) provides access to major thermal basins and attractions including Old Faithful, Norris Geyser Basin, Mammoth Hot Springs terraces, and the Grand Canyon of the Yellowstone.

Wildlife you might see

American bison, elk, grizzly bear, black bear, gray wolf, pronghorn, bighorn sheep, moose, mule deer, coyote, red fox, river otter, beaver, osprey, bald eagle, trumpeter swan, sandhill crane, great gray owl, American white pelican, cutthroat trout, and over 300 bird species. The Lamar Valley is particularly renowned for wolf watching at dawn and dusk.

Flora

Lodgepole pine forests (dominant tree species covering 80% of forested areas), whitebark pine, Douglas fir, Engelmann spruce, subalpine fir, quaking aspen, willow species along riparian corridors, wildflower meadows featuring lupine, Indian paintbrush, arnica, and sticky geranium. Thermophilic bacteria and archaea create colorful microbial mats around hot springs.

Safety & preparation

Maintain at least 25 yards from bison and elk, 100 yards from bears and wolves. Carry bear spray in accessible location and know how to use it. Stay on boardwalks in thermal areas as ground may be thin crust over boiling water. Water in thermal features is acidic and scalding. Do not approach or feed any wildlife. Be prepared for rapid weather changes and afternoon thunderstorms in summer. Acclimate to elevation gradually. Purify all backcountry water. Store food properly in bear-proof containers or lockers. Cell phone coverage is extremely limited throughout the park.

Watch on YouTube