Why Four Apollo Astronauts Once Explored This Idaho Lava Field
On August 22, 1969, NASA brought four Apollo astronauts, Alan Shepard, Edgar Mitchell, Joe Engle, and Eugene Cernan, to Craters of the Moon National Monument for volcanic geology training. Alan Shepard later walked on the moon during Apollo 14 in 1971. The astronauts returned in 1999 to celebrate the monument's 75th anniversary. Their training here helped the Apollo missions bring back roughly 850 pounds of moon rock across six missions.
Why Alan Shepard's presence connects this site directly to an actual moon landing
Alan Shepard trained here in 1969 and went on to actually walk on the moon during the Apollo 14 mission in 1971, worth understanding this as a direct, documented link between this specific Idaho landscape and an actual lunar landing, not a general astronaut visit.
Why 850 pounds of moon rock is the tangible result of this kind of training
Across six Apollo missions, astronauts brought back roughly 850 pounds of lunar samples, worth understanding that field training like this helped astronauts recognize which rocks were scientifically worth collecting, a measurable outcome of their geology preparation.
Why the astronauts' own 1999 return visit confirms this history's lasting significance
The same astronauts came back specifically to celebrate the monument's 75th anniversary in 1999, worth understanding this as the astronauts themselves treating the site as genuinely meaningful decades later, not a forgotten training stop.
What This Means for Planning a Visit
The practical takeaway is that walking the same lava landscape these astronauts explored connects a visit directly to documented Apollo-era history, worth seeking out the specific training areas along the Loop Road. Arco's own practical visiting details are covered on the city's main page.