Nevada’s Cathedral Gorge Looks Like a City Carved From Stone

If you drive through eastern Nevada, you see a lot of flat desert and scrub brush. But right in the middle of a long valley, the ground opens up into something totally different.

You suddenly find yourself staring at tall, tan spires and deep, narrow slot canyons. The walls look exactly like the carved architecture of a giant Gothic cathedral. That is why they call it Cathedral Gorge State Park. But here is the crazy part. Those massive towers are not made of hard rock. They are basically just giant piles of dried mud and ash.

Volcanic Ash And An Ancient Lake

To understand how the park formed, you have to rewind a few million years. Back then, violent volcanoes erupted all over this area. They blasted massive amounts of ash into the sky.

That thick ash settled into a giant freshwater lake that covered the valley. Over a long period, the climate changed, and the lake completely dried up. The ash mixed with the dirt was baked in the hot sun, turning into a soft rock called bentonite clay. So instead of a hard stone like granite or sandstone, the entire valley floor was covered in a thick layer of compacted clay.

Carved By Rain

This clay is incredibly soft. When it rains in the desert, it usually pours all at once. The water hits the ground hard and has nowhere to soak in.

Instead, it runs rapidly down the sides of the clay hills. Because the dirt is so weak, the water washes it away almost instantly. This rapid runoff cuts deep, narrow grooves right into the hillsides. As the water digs deeper year after year, it leaves behind tall, thin spires. These are the giant fluted pillars that look like castle towers or church walls.

Walking Through The Moon Caves

The coolest part of the park is how the water carved the lower sections. The rain dug out extremely narrow slot canyons right into the sides of the clay hills. Locals call these the “moon caves.”

You can actually walk straight into them. The passageways twist and turn, and the walls are so high and close together that it gets completely dark and cold inside, even on a blazing hot summer day.

But because the whole park is just made of soft clay, the landscape is incredibly fragile. The same water that built the cathedrals is slowly destroying them. Every time a heavy thunderstorm rolls through the valley, the walls wash away a little bit more. The park is actively falling apart and reshaping itself right in front of you.