A Landscape Like Nowhere Else
In the northern reaches of the park, Mammoth Hot Springs looks almost otherworldly: tiers of pale, chalky stone stepping down the hillside, steaming in the mountain air. It is one of the most unusual sights on any Yellowstone tour, and it forms in a way unlike the park’s famous geysers. Here is what makes it special.
How the Terraces Form
Unlike the geyser basins, which sit on volcanic rock, Mammoth is built on limestone. Hot water rising through that limestone dissolves it and carries the mineral to the surface, where it hardens into a rock called travertine. Over time this builds the famous terraces, layer upon delicate layer. Because the water flow shifts, the formations are always slowly changing, so no two visits look quite the same.
The Colors and the Steam
The terraces glow in whites, tans, and grays, often streaked with orange, brown, and green. Those colors come from heat-loving microbes living in the warm water, just like at the park’s hot springs. Steam drifts across the formations, and boardwalks let you wander among them up close, both on the lower and upper terraces.
Tips for Visiting
A little planning makes the most of your stop:
- Walk both the lower and upper terrace boardwalks for different views.
- Stay on the boardwalks, since the ground and water are fragile and hot.
- Look for elk, which often rest on the lawns of the nearby historic district.
- Bring sun protection, as the area is open and bright.
Part of the North Loop
Mammoth Hot Springs sits near the North Entrance and the Wyoming and Montana border, making it a natural stop on a northern Yellowstone route. It pairs well with wildlife watching in the nearby valleys. As always, treat the formations with care, since they are as fragile as they are beautiful.
See the Terraces for Yourself
Mammoth Hot Springs is proof that Yellowstone is full of surprises beyond its geysers. The steaming, ever-changing travertine terraces are a sight you will not forget. Ask us about Yellowstone tours that include Mammoth, and get ready to explore one of the park’s most unusual wonders.