Allen's chipmunk is a species of rodent

Rodent

Rodentia is an order of mammals also known as rodents, characterised by two continuously growing incisors in the upper and lower jaws which must be kept short by gnawing....

 in the family Sciuridae. It is endemic to the United States

United States

The United States of America is a federal constitutional republic comprising fifty states and a federal district...

. The main populations are found in California

California

California is a state located on the West Coast of the United States. It is by far the most populous U.S. state, and the third-largest by land area...

, specifically the humid forests of the mountainous areas of Northern California including the Northern Coastal Range of California, the Trinity Alps

Trinity Alps

The Trinity Alps are mountains in Northern California, in the Pacific Coast Ranges physiographic region, located to the northwest of Redding. Elevations there range from to at Thompson Peak. The Trinity Alps Wilderness covers , making it the second largest wilderness area in California...

, the Siskiyou Mountains

Siskiyou Mountains

The Siskiyou Mountains are a coastal mountain range in the northern Klamath Mountains in northwestern California and southwestern Oregon in the United States. They extend in an arc for approximately from east of Crescent City, California northeast along the north side of the Klamath River into...

, and the Sierra Nevada as far south as Fresno

Fresno

Fresno is the fifth largest city in California.Fresno may also refer to:-Places:Colombia* Fresno, TolimaSpain* Fresno, a ghost village in Nidáliga, Valle de Sedano, Burgos* Aldea del Fresno, Madrid* Fresno de la Vega, Ribera del Esla, León...

. They stretch into Oregon

Oregon

Oregon is a state in the Pacific Northwest region of the United States. It is located on the Pacific coast, with Washington to the north, California to the south, Nevada on the southeast and Idaho to the east. The Columbia and Snake rivers delineate much of Oregon's northern and eastern...

's Warner Mountains

Warner Mountains

The Warner Mountains are an 85-mile-long mountain range running north-south through northeastern California and extending into southern Oregon in the United States...

, and reach into the Nevada

Nevada

Nevada is a state in the western, mountain west, and southwestern regions of the United States. With an area of and a population of about 2.7 million, it is the 7th-largest and 35th-most populous state. Over two-thirds of Nevada's people live in the Las Vegas metropolitan area, which contains its...

 side only around the Tahoe

Lake Tahoe

Lake Tahoe is a large freshwater lake in the Sierra Nevada of the United States. At a surface elevation of , it is located along the border between California and Nevada, west of Carson City. Lake Tahoe is the largest alpine lake in North America. Its depth is , making it the USA's second-deepest...

basin. It is also called the Shadow Chipmunk by Jameson & Peeters (1988) and Thorington and Hoffman (2005).