Yellowstone National Park

Yellowstone sits atop a massive volcanic caldera that fuels over 10,000 geothermal features. The Upper Geyser Basin alone contains nearly 300 geysers within one square mile, including the iconic Old Faithful, which erupts roughly every 90 minutes. Grand Geyser produces the park's tallest predictable eruptions, shooting water 150 feet or more into the air. Beyond geysers, the park's hot springs are equally spectacular — Grand Prismatic Spring at Midway Geyser Basin is the third-largest hot spring in the world, measuring 370 feet in diameter with vivid rainbow-colored microbial mats radiating from its deep blue center. Mud pots like those at Fountain Paint Pot bubble and boil with acidic clay, while fumaroles hiss steam across the geyser basins. The Norris Geyser Basin is the hottest and most dynamic area in the park, where Steamboat Geyser holds the record for the tallest active geyser with eruptions reaching 300–400 feet.

Yellowstone's Lamar Valley and Hayden Valley are often called America's Serengeti for their concentration of large mammals. The park is home to the largest remaining bison herd in the United States — roughly 5,000 animals that descend from the 23 survivors of near-extinction. Bison jams are a common experience as herds cross park roads, particularly during the July–August rut. Grizzly bears number around 150 in the park and are frequently spotted in the Hayden and Lamar Valleys, especially in spring and fall. Gray wolves, reintroduced in 1995, now number around 100 across 8–10 packs, with the Junction Butte pack most visible in Lamar Valley at dawn. Elk, pronghorn, bighorn sheep, moose, and bald eagles round out Yellowstone's remarkable wildlife viewing opportunities. Always maintain a safe distance: 100 yards from bears and wolves, 25 yards from other wildlife.

The Yellowstone River has carved a spectacular 20-mile canyon through rhyolite rock, creating one of the park's most dramatic landscapes. The Lower Falls plunge 308 feet — nearly twice the height of Niagara Falls — and are best viewed from Artist Point on the South Rim, the park's most iconicvista. The Upper Falls drop 109 feet and can be viewed from the Brink of the Upper Falls trail, where you can feel the power of the river as it plunges over the cliff. The canyon walls are painted in vivid oranges, reds, and yellows from iron compounds in the rhyolite, giving the gorge a painterly quality that lives up to its name. Trails along both the North and South Rims connect multiple viewpoints, and the adventurous can take Uncle Tom's Trail (when open) down steep stairs to river level for the most dramatic perspective of the Lower Falls.

Summer (June–August) offers full road access and the best weather, but brings peak crowds of over 25,000 visitors per day. June provides wildflowers and manageable crowds with all roads typically open by mid-month. May and September are ideal for wildlife and fewer crowds, though some facilities may be limited. Winter transforms the park into a snowy wonderland accessible only by snowcoach or snowmobile, offering surreal geyser viewing and excellent wolf tracking. Book lodging 6–13 months in advance for summer visits. The park's five entrances each serve different regions — the West Entrance (West Yellowstone) is closest to the geyser basins, while the North Entrance (Gardiner) provides year-round road access to Mammoth and the Lamar Valley. Carry bear spray on all hikes, download offline maps, and fill up on gas in gateway towns.