Scattered in the lava ash were hundreds of bear tracks that could be traced for miles. The rumor of a dwarf grizzly bear was one of the initial reasons why Robert W. Limbert wanted to explore the unnamed Craters of the Moon area since the mid-1910s.
Twelve unidentified men and women explored Lost Valley near Arco with Robert W. Limbert in 1926. These people were part of the Seattle Mountaineers and Mount Stuart Alpine Clubs.
A group of men and women from the town of Arco took the expedition group out to Lost Valley before they started their journey into Craters of the Moon.
Printed in Robert W. Limbert's National Geographic article on his expeditions, this is an interior shot of what he called Amphitheater Cave in Craters of the Moon. "This is one of a series of eight caves found near the Bridge of Tears. It is an...
Five male explorers rest in the cave that explorer Robert W. Limbert named Amphitheater Cave. Limbert described the cave as being "explored for half a mile underground until we came across apparently fresh bear tracks when we turned around and came...
Robert W. Limbert used this pocket sextant thermometer-barometer-compass for his explorations into what was later named the Craters of the Moon National Monument.
Four men from the June 1921 expedition examine a large crater in the volcanic floor, including Robert W. Limbert (far right). A rifle sits in the distance.
A row of hundreds of people from the neighboring town of Arco line up to greet the expedition upon their arrival at the end of the trip. A large picnic followed in town.
