Robert W. Limbert and his exploration party stop to pose on a large volcanic mass. Two men stand on parts of the volcanic rock, while another man sits inside.
The lack of roads across uneven volcanic ground made this expedition into Craters of the Moon dangerous and tiring for both the men and animals involved.
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.
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.
Three men from the expedition rest while traveling over the volcanic ground. Ad Santel (left) holds a camera while one man drinks from a canteen and another holds a rifle.
A line of pack horses make a half circle as they cross the volcanic soil of the Craters of the Moon area. The horses are barely distinguishable from the rocks on the right side of the photo, about a quarter of the way down from the top.
Caption from one of Robert Limbert's scrapbooks: "One morning we sighted a band of sheep which had got lost and true to a homing instinct had endeavored to get back to their home range on the shortest possible route. The result was they were in...
An unidentified man crouches down to explore the ripples of the lava fields. He holds a shotgun in his right hand while touching the ripples with his other hand.
An example of the "Blue Dragon Lava Flow" that explorer Robert W. Limbert wrote about in his National Geographic article. "This remarkable flow is well named. Its surface is netted and veined with small cracks like scales of a prehistoric monster,...
Robert W. Limbert stands behind his camera and films a large explosion pit found at the east end of the area. Two unidentified men stand on either side of him.
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.
