🇺🇸 United States · West Coast and California
Mammoth Lakes is a mountain town on the eastern slope of California's Sierra Nevada, at about 2.400 meters, that has become one of the state's great ski and nature tourism centers. In winter, the enormous Mammoth Mountain resort —one of the snowiest in the United States and with one of the longest seasons— draws skiers from all over California; in summer and fall, the alpine lakes, the trails, the waterfalls and the volcanic landscapes turn it into an outdoor paradise.
The town is surrounded by an extraordinary landscape dominated by volcanic activity: Mammoth Mountain itself is a volcano, and the surroundings hold geological oddities such as the Devils Postpile, a sea of basalt columns, or the mysterious Mono Lake and Mono Craters a little farther north. It is also one of the gateways to the east side of Yosemite (by the Tioga Road, in summer) and a key point on the scenic US-395 route, which runs along the foot of the high Sierra.
This guide walks you through the essentials of Mammoth Lakes with a practical eye: what to do in winter and in summer, the unmissable lakes and trails, the Devils Postpile and Rainbow Falls, how to get around on the town's free transport, when the mountain access roads close for snow, and where to sleep and eat. It is an ideal destination for combining skiing or the mountains with a road trip along US-395 and the Sierra parks.
The eastern side of the Sierra was the territory of the Paiute (Mono) people, who lived from fishing, hunting and gathering, and traded through the mountain passes. The name 'Mammoth' comes from the short-lived mining rush of the late 19th century, when the Mammoth Mining Company looked for gold in the area; the boom did not last long and left mining remains behind. In the 20th century, the visionary Dave McCoy developed the Mammoth Mountain ski resort from the 1930s-1950s onward, turning the town into a tourist destination. Today Mammoth Lakes lives off skiing, the mountains and nature tourism. The full story is on our history page.
Read the full history ↓The golden state of the Pacific: land of dozens of Native peoples and of the Franciscan missions, forged by the gold rush of 1849, today the largest economy in the United States and the cradle of Hollywood, Silicon Valley and legendary parks such as Yosemite and Sequoia.
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Origins, formation and what the sources say.
Mammoth Lakes hides a double surprise: its name has nothing to do with any mammoth, and the ground the skiers stand on is really the roof of one of the most closely watched volcanoes in the United States. But long before the snow and the underground fire defined its fame, these mountains already had people who belonged to them.
The eastern side of the Sierra Nevada, where Mammoth Lakes sits today, was for centuries the territory of the Paiute people, in particular the groups known as the Mono Lake Paiute or Kucadikadi. These peoples were admirably adapted to life in a land of sharp contrasts, between the snowy high mountains and the desert valleys to the east. They moved seasonally to make the most of the resources of each area and elevation.
One of the most singular features of their economy was the use of the larvae of an insect (the 'alkali fly') that swarmed on the shores of nearby Mono Lake, a salty, alkaline lake. Those larvae, called kutsavi, were a nutritious food and a valuable trade good. The Paiute also gathered pine nuts from the local pines, hunted and fished, and maintained trade routes across the Sierra passes to exchange goods with the peoples on the western side, such as the Miwok.
The mountain passes that scenic highways run through today were, back then, ancient routes of trade and communication between the two sides of the range. The arrival of miners and settlers in the 19th century, with the pressure on water, land and resources, profoundly transformed their world, though the Paiute maintain their presence and identity in the region to this day.
The name 'Mammoth' does not come from any paleontological find but from the mining rush that shook the area in the late 19th century. In the 1870s, the discovery of gold on the mountain drew prospectors and mining companies, and the Mammoth Mining Company was formed, giving its name to the place and to the short-lived mining town of Mammoth City, thrown up in a hurry on the slopes. For a few years, thousands of people came hoping to make a fortune.
However, as happened with so many mining camps in the West, the boom was as intense as it was brief. The deposits turned out to be less rich than expected and, within a few years, activity declined and the population scattered, leaving Mammoth City all but deserted. What remained were traces of the mining —ruins, old installations, tunnels— that can still be tracked down in the area and that recall that fleeting golden dream.
Over the following decades, the region returned to relative quiet, with some ranching, logging and fishing, while the beauty of its lakes and mountains began to draw the first summer visitors and anglers. The real engine of modern Mammoth, though, would be neither gold nor timber, but snow.
The transformation of Mammoth Lakes into the great destination it is today owes a great deal to one man: Dave McCoy. From the 1930s and 1940s onward, McCoy, a skiing enthusiast who worked measuring snow for water management, saw the extraordinary potential of Mammoth Mountain, a mountain that received enormous amounts of snow. He started by installing rudimentary lifts (at first a simple motor-driven winch) to carry skiers up the slopes.
With vision, hard work and constant reinvestment, McCoy developed the resort over the decades, building chairlifts and services and founding what would become Mammoth Mountain Ski Area, one of the largest and most successful in California and in the whole United States. The huge amount of snow and the long season made Mammoth a magnet for skiers from southern and central California, turning the old mining spot into a thriving tourist town.
The growth of skiing drove the town's urban development, and it was officially incorporated as a municipality in 1984. McCoy ran the resort for more than half a century, until he sold it in 2005, and lived to 104 (he died in 2020), by then a legend of American skiing. Today Mammoth Lakes combines its identity as the ski capital of the eastern Sierra with a flourishing summer mountain tourism, and Dave McCoy is remembered as the pioneer who, literally, built the destination out of the snow. His legacy lives on in a resort that keeps its reputation for the amount and the length of its snow season.
The story of Mammoth Lakes makes no sense without its geology. The town and its mountains sit on one of the most active volcanic zones in the United States: the Long Valley Caldera, an enormous depression about 32 by 18 kilometers formed by a cataclysmic eruption some 760.000 years ago. That explosion threw out hundreds of cubic kilometers of material —the so-called 'Bishop Tuff'— and emptied the magma chamber, whose roof collapsed to create the caldera. Mammoth Mountain itself is a much younger volcano, a complex of lava domes formed between roughly 110.000 and 57.000 years ago.
That igneous inheritance is felt everywhere: in the fumaroles and hot springs of Hot Creek, in the Mammoth Mountain CO₂ trees (areas where volcanic gas seeping from the ground has killed trees), in the Inyo and Mono Craters —a chain of very recent domes and craters, some only a few hundred years old— and in the Devils Postpile itself, born from the cooling of basaltic lava flows. The region is still closely monitored by the U.S. Geological Survey's Long Valley Volcano Observatory (USGS).
In the mid-1980s, an episode of earthquakes and ground deformation around the caldera set off alarm and intensive study, a reminder that the volcano is not extinct but dormant. For the visitor, all that activity translates today into a fascinating landscape of hot springs, lava formations and geological viewpoints that coexist with the snow and the alpine lakes, and that make Mammoth a unique place where the fire of the Earth and the ice of the high mountains meet.