Exploring Black Sand Basin In Yellowstone National Park

Black Sand Basin is a geothermal area located in Yellowstone National Park in Wyoming.

It is known for its unique and colorful hydrothermal features, including hot springs, geysers, and other geothermal formations. The basin is a 1-mile drive northwest of Old Faithful along the main road.

The name “Black Sand Basin” comes from the dark-colored volcanic sand that surrounds some of the hydrothermal features. The sand is actually composed of tiny fragments of volcanic glass that have been weathered over time.

Some of the notable features of Black Sand Basin include:

Rainbow Pool: This is a striking hot spring with vibrant colors caused by different types of heat-loving bacteria that thrive in the varying temperatures of the pool.

Sunset Lake: A small, quiet hot spring with beautiful blue waters and a colorful mineral deposit rim.

Opalescent Pool: Known for its opalescent coloration and the unique algae mats that grow in its warm waters.

Cliff Geyser: A geyser on the edge of Iron Spring Creek that erupts every few minutes, sometimes up to 40 feet high.

Emerald Pool: This pool is a brilliant shade of green and features a deep blue center. It’s one of the deeper and cooler hot springs in the area.

The area is accessible by a boardwalk trail that allows visitors to safely observe and appreciate the geothermal features while protecting the fragile ecosystem. Information boards are located along the trail.

This is an easy 0.5-mile out-and-back trail perfect for the whole family and is wheelchair accessible.

Black Sand Basin provides visitors with a chance to witness the geothermal wonders that make Yellowstone National Park famous.

Safety reminder:

It is illegal to touch or throw objects into hot springs or other hydrothermal features at the park. Always stay on the walkway in thermal areas.