San Juan Basin, Structural basin in Four Corners region, United States
The San Juan Basin spans a large area of high plateaus, mesas, valleys, and plains across four states in the Four Corners region. The landscape is dry and open, marked by rock formations, deep canyons, and wide grasslands.
The basin formed over millions of years as tectonic forces pushed and shifted the earth's crust in this region. Layers of sediment accumulated and hardened, creating the rock formations and geological features visible today.
Native American groups built settlements and left behind archaeological sites throughout the region that visitors can still see today. These remnants show how people adapted to living in this dry landscape over many centuries.
Access to many areas is open, but some sections cross private or protected land, so check local rules before exploring. Spring and fall offer the most comfortable temperatures for visiting and walking around the landscape.
The basin produces significant amounts of natural gas, and scientists have tracked a large methane cloud hovering above it that can be detected from space. This invisible phenomenon reveals how energy extraction and environmental concerns are linked in this region.
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