UNDERGROUND LAVA TUBES! This 3-day geologic backpacking adventure was to explore the geology of Pisgah’s beautiful lava tubes, caves, arches and volcanic rocks. Pisgah Volcanic Crater is a young cinder cone located between Barstow and Needles, California. According to most geologists, the last eruption occurred between 20,000 to 50,000 years ago. The lava field at this location is over 50 square miles in area. Depending on how you define a lava tube, there are over 300 lava tubes at this location. Most of these tubes are small, but the most well-known is “SPJ Cave”, which is over 1,300 feet long. While I spent most of my time exploring the geology of the basalt lava fields and tubes, I did explore and camp on the top of Pisgah Volcanic Crater to watch a beautiful sunset. For those that want to follow my adventures on YouTube, you can access all of my 60+ videos at:    / @joseph_wright   . Happy trails, Joe