Qualla: Chocolate Mountains

Chocolate Mountains: Introduction

Wed, 01 Apr 2026 00:00:00 GMT

Photo credit Tuxyso, CC BY-SA 3.0. The Chocolate Mountains take their name from the dark volcanic rock that gives the range its distinctive coloring against the pale desert floor. They run more than sixty miles in a northwest-southeast direction between the Salton Sea and the Colorado River, a rugged and largely inaccessible chain that rises sharply from the surrounding lowlands. Mount Barrow, the highest point, reaches 2,475 feet — modest by California mountain standards but prominent in the flatlands of the Sonoran Desert. Much of the range is enclosed within the Chocolate Mountain Aerial Gunnery Range, the Marine Corps bombing practice zone that has restricted public access and, incidentally, preserved the wilderness that access restrictions tend to protect.

Read more: Chocolate Mountains on Qualla

Image: Tuxyso | CC BY-SA 3.0

Chocolate Mountains: Ancient Rock in a Young Desert

Wed, 01 Apr 2026 00:00:00 GMT

Photo credit Nandaro, CC BY-SA 3.0. The geology of the Chocolate Mountains tells a story that extends far beyond the human timeline. The range's basement is made of Precambrian rocks — among the oldest on the surface of North America — overlaid with Orocopia Schist, a metamorphic formation, and intruded by Mesozoic...

Read more: Chocolate Mountains on Qualla

Image: Nandaro | CC BY-SA 3.0

Chocolate Mountains: Desert Bighorn and Feral Horses

Wed, 01 Apr 2026 00:00:00 GMT

Photo credit Unknown authorUnknown author or not provided, Public domain. The Indian Pass Wilderness, encompassing 32,008 acres within the Chocolate Mountain range, supports a population of approximately 25 desert bighorn sheep — a small but established group of one of the Southwest's most iconic large mammals. Desert bighorn are supremely adapted to t...

Read more: Chocolate Mountains on Qualla

Image: Unknown authorUnknown author or not provided | Public domain

Chocolate Mountains: The Gold Workings

Wed, 01 Apr 2026 00:00:00 GMT

Photo credit Charles O'Rear, Public domain. Small gold deposits were worked in the Chocolate Mountains during the nineteenth century, part of the same prospecting fever that sent thousands of men into the California and Arizona deserts searching for mineral wealth. The workings in the Chocolate Mountains were never large —...

Read more: Chocolate Mountains on Qualla

Image: Charles O'Rear | Public domain

Chocolate Mountains: A Military Horizon

Wed, 01 Apr 2026 00:00:00 GMT

Photo credit Raindrift, CC BY-SA 3.0. The most consistent presence in the Chocolate Mountains today is military. The Chocolate Mountain Aerial Gunnery Range encloses most of the chain, and the sounds of aircraft conducting live-fire exercises are a regular feature of the soundscape here. Warning signs mark the bounda...

Read more: Chocolate Mountains on Qualla

Image: Raindrift | CC BY-SA 3.0