In the Spring of 1920 he was ready for a more daring undertaking. Accompanied by W.L. Cole of Boise, he completed a 17 day, 80 mile odyssey through the lava wilderness. They carried blankets, cooking gear, camera and tripod, binoculars, a compass, guns, and two weeks of dried food - 55 pounds of equipment each! They also brought along a camp dog, a decision they were to regret. After three days of travel over the rough lava, the dog's feet were raw and bleeding. For the remainder of the trip, Limbert and Cole had to carry the dog or wait for him to pick his way across the rock.
They crossed 28 miles of jagged aa flows the first three days. Sleeping at night was almost impossible, for they could not find a level place to lie down. To locate scattered waterholes, they followed old Indian or mountain sheep trails, or watched for places where groups of birds dropped from the sky to quench their thirst.
Throughout the trip Limbert photographed the landscape. He also gave colorful names to many features: Vermillion Canyon, Trench Mortar Flat, Echo Crater, Yellowjacket Water Hole, Amphitheater Cave, and the Bridge of Tears.
Limbert continued to explore the region following this journey. In 1921 he led 10 scientists and civic leaders into the lava fields and argued for protection of the area's volcanic features. During the trip he made over 200 still photographs and 4,000 feet of motion picture film.