When you picture the training grounds for Apollo astronauts, you probably imagine high-tech simulators, sterile clean rooms, or maybe a desert in Arizona. You don’t think of a place called the Valley of Ten Thousand Smokes. And yet, that’s exactly where NASA sent its moonwalkers — to a volcanic wasteland in Alaska so alien that it felt like another planet.
The contrast is almost laughable. While the public saw astronauts floating in pools or strapped into centrifuges, some of the most critical training for the Moon happened in a landscape blasted into oblivion by the largest volcanic eruption of the 20th century. In 1912, the Novarupta vent exploded, spewing 13 cubic kilometers of ash and pumice across the Alaska Peninsula. Steam vents hissed from the scorched ground — thousands of them. That’s how the valley got its name. And decades later, it became a stand-in for the lunar surface.
A Hellish Playground for Lunar Geologists
The Valley of Ten Thousand Smokes isn’t just barren — it’s otherworldly. The ash deposits formed deep, unstable gullies. The ground ranges from gray to brown, with scattered blocks of volcanic rock. Sound familiar? The Apollo missions needed astronauts who could act as field geologists on the Moon — not just pilots, but scientists who could spot an interesting rock from a hundred meters away. So NASA looked for the closest thing to the lunar surface on Earth.
Between 1969 and 1972, crews from Apollo 14, 15, 16, and 17 spent weeks in the valley. They hiked with prototype tools, practiced collecting samples, and learned to describe textures and colors under pressure. The training was brutal. Days were long, the terrain unforgiving, and the weather could shift from drizzle to blizzard in an hour. Exactly the kind of chaos you’d expect on the Moon.
As Dr. Sarah K. Noble, a planetary geologist at NASA Headquarters, once said in an interview: “The Apollo astronauts didn’t just learn geology from textbooks. They lived it in the most extreme environments we could find. The Valley of Ten Thousand Smokes taught them to observe, adapt, and communicate — skills you can’t teach in a classroom.”
Why Alaska? Because the Moon Doesn’t Care About Your Comfort
So why not train in Hawaii or the desert Southwest? Those places were used too, but Alaska offered something unique: a freshly deposited volcanic ash layer that mimicked the lunar regolith in texture and response to foot traffic. Plus, the sheer scale of the valley — miles of ash-covered terrain under a low, gray sky — gave astronauts a sense of isolation and enormity. That’s a hard experience to replicate in a lab.
The astronauts were split into teams: one stayed in the field, the other in a simulated Mission Control back at base camp. Radio communications were delayed to mimic the time lag from Earth to the Moon. It was the real deal. And the rocks they collected? Many were volcanic basalts, chemically similar to the mare basalts they’d later scoop up from the lunar surface.
Looking back, it’s no surprise that the Valley of Ten Thousand Smokes produced the most skilled lunar field geologists in history. Without it, Apollo 15 commander David Scott might not have spotted the famous “Genesis Rock” — a fragment of lunar anorthosite that helped unlock the Moon’s early history.
This kind of hands-on training isn’t history. It’s making a comeback. NASA Just Made a Boring Hire — And That’s Exactly What It Needs — a field geologist to lead the next generation of moonwalkers. The agency is smart to realize that you can’t simulate everything. Sometimes you have to put boots on the ground, even if that ground is covered in volcanic ash a thousand miles from civilization.
Artemis Astronauts Will Play the Same Game — With Modern Tech
The Artemis program plans to send astronauts to the lunar south pole, where the terrain is far more rugged than the Apollo landing sites. That means training has to be even more intense. NASA has already started sending astronaut candidates to remote locations: the Canadian Arctic, Iceland, the Arizona desert. But the Valley of Ten Thousand Smokes remains a benchmark. The same techniques that worked for Apollo — sample documentation, field sketches, verbal descriptions — will be used again, this time with augmented reality headsets and real-time data uplinks.
Artemis II Photo Reveals the Moon’s Harsh Terminator — What It Means reminds us that the lunar environment is unforgiving. The terminator line between light and dark is razor sharp, and the south pole’s permanently shadowed regions are a challenge no Apollo astronaut ever faced. Training in Alaska’s volcanic valleys — where fog, snow, and ash can obscure your view in seconds — is excellent preparation for that kind of chaos.
Dr. Teasel Muir-Harmony, curator of the Apollo collection at the Smithsonian National Air and Space Museum, puts it this way: “The Valley of Ten Thousand Smokes was a proving ground for the Apollo lunar explorers. It taught them to think like geologists under extreme conditions. As we go back to the Moon with Artemis, we’re not starting from scratch — we’re building on a legacy of learning in Earth’s most alien landscapes.”
The USGS describes the valley as a “window into volcanic processes,” but for NASA, it was a window into the Moon itself. The training wasn’t just about science — it was about psychology. Astronauts had to learn to stay calm when everything around them looked like a disaster zone. Because on the Moon, that’s exactly what it is.
What the Moon Game Means for You
You might wonder: why does this old training matter today? Because the next time you hear about an Artemis astronaut preparing for a Moon mission, remember that they’re likely getting their boots dirty in some remote, godforsaken corner of Earth. The Moon game isn’t played on a computer screen. It’s played in ash, ice, and rock. And the rules were written in Alaska.
NASA’s Apollo geology training program set the standard for how humans explore other worlds. The same techniques — walking transects, collecting context samples, documenting every step — are now being encoded into rovers and suits for the Moon and Mars. The Valley of Ten Thousand Smokes was a classroom. But the lessons are universal.
As we push toward landing the first woman and the first person of color on the Moon, the legacy of those early training missions in Alaska will be felt. The astronauts of tomorrow will play the same game, just with better tools and bigger goals. And somewhere, a field geologist is already scouting the next analog site — probably in a place you’d never expect.
Frequently Asked Questions
Why did NASA choose the Valley of Ten Thousand Smokes for Apollo training?
The valley’s thick deposits of volcanic ash closely resemble the lunar regolith in texture and color. It also offered a vast, isolated landscape that helped astronauts practice field geology under realistic conditions, including delayed communications and harsh weather.
Which Apollo astronauts trained in Alaska?
Crews from Apollo 14, 15, 16, and 17 — the missions that included lunar surface operations — participated in Alaska training. Notable astronauts include Alan Shepard, David Scott, John Young, and Eugene Cernan, along with their backup crews and scientists.
Are modern Artemis astronauts training the same way?
Yes, but with updated technology. NASA continues to use Earth analogs like volcanic regions, deserts, and arctic terrain to train astronauts for Artemis. The field geology approach remains central, now augmented with digital tools and real-time data analysis from support teams.
