Lower Terraces - South Trailhead

NPS / Jacob W. Frank

Quick Facts

Location:

Mammoth Hot Springs

Amenities

4 listed

Historical/Interpretive Information/Exhibits, Information Kiosk/Bulletin Board, Trailhead, Wheelchair Accessible

This trailhead leads into the top of the Lower Terraces, with close walks to Mound & Jupiter Terraces, New Blue Spring, Cleopatra Spring & Terrace, and Minerva Spring and Terrace. Continuing along the boardwalk beyond New Blue Spring leads to the Upper Terrace boardwalk.

Mammoth Hot Springs

A network of fractures and fissures form the plumbing system that allows hot water from underground to reach the surface at Mammoth Hot Springs. Small earthquakes may keep the plumbing open. The water comes from rain and snow falling on surrounding mountains and seeping deep into the earth where it is heated.

The volcanic heat source for Mammoth Hot Springs remains somewhat of a mystery. Scientists have proposed two sources: the large magma chamber underlying the Yellowstone Caldera or a smaller heat source closer to Mammoth.

For hundreds of years, Shoshone and Bannock people collected minerals from the Mammoth Hot Springs terraces for white paint.

Travertine Terraces

Travertine terraces are formed from limestone (calcium carbonate). Water rises through the limestone, carrying high amounts of dissolved calcium carbonate. At the surface, carbon dioxide is released and calcium carbonate is deposited, forming travertine, the chalky white rock of the terraces. Due to the rapid rate of deposition, these features constantly and quickly change.

Accessibility

Transitions from asphalt walkways to boardwalks may require assistance. Some sections of boardwalk are wheelchair-accessible. The rest of the area has stairs or steep grades due to terrain. Distance from parking in front of Liberty Cap to the end of the boardwalk at Palette Spring is approximately 135 yards.

Use Caution in Hydrothermal Areas

• Stay on boardwalks and designated trails.
• Hydrothermal water can severely burn you.
• Never run, push, or shove.
• Supervise children at all times.
• Do not scratch hydrothermal mats.

You are responsible for your safety.

Think safety, act safely. Yellowstone is a dangerous place.