Sierras are mountain ranges. Mountains in Spanish-speaking and Portuguese-speaking regions often have "sierra" in front of their names, such as the Sierra del Sur in southern Mexico or the Sierra Negra in Ecuador.

Sierra is a Spanish word that means "saw." The peaks of sierras are often rocky and jagged, like the rugged teeth of a saw blade.

In the United States, the Sierras or the High Sierra usually refers to the Sierra Nevada, a craggy mountain range that borders the U.S. states of California and Nevada.

The African country of Sierra Leone was named by European explorers in the fifteenth century. Sierra Leone means lion mountains in Italian. The name comes from the Loma Mountains and the lions native to the area.

Sierras are often popular places for skiing and snowboarding in the winter or camping and hiking in the summer. The Sierra Club, one of the most important environmental preservation groups in the United States, was founded in 1892 by the conservationist John Muir.

sierra
The sierras of the Sierra Nevada glisten in the twilight.
border
Verb

to exist on the edge of a boundary.

camp
Verb

to live outdoors in temporary shelter such as tents, usually for recreation.

conservationist
Noun

person who works to preserve natural habitats.

country
Noun

geographic territory with a distinct name, flag, population, boundaries, and government.

craggy
Adjective

rugged or rocky.

environment
Noun

conditions that surround and influence an organism or community.

explorer
Noun

person who studies unknown areas.

high sierra
Noun

tallest part of a high mountain range, usually in a Spanish-speaking country.

hike
Verb

to walk a long distance.

John Muir
Noun

(1838-1914) Scottish-American conservationist.

mountain range
Noun

series or chain of mountains that are close together.

Noun

protection from use.

Noun

any area on Earth with one or more common characteristics. Regions are the basic units of geography.

Noun

high mountain range with jagged peaks.

skiing
Noun

art and sport of gliding across snow on long, narrow boards strapped to the bottom of the athlete's feet.

snowboarding
Noun

art and sport of gliding across snow on a short piece of wood and/or fiberglass attached to the bottom of the athlete's foot.