, Auditorium
The Bob Marshall Wilderness famously contains some of the best alpine caves in the United States. The Silvertip Cave system resides in this area and cavers have explored it for decades. During the 2025 Silvertip Expedition, the team focused on exploring other caves in the area. The main highlight of this year's expedition was pushing Bobsled Cave, which was previously discovered in 2023. It proved to be an exceptional, sporty cave filled with virgin borehole. The team added 1,000 ft of vertical depth to the cave, bringing the total depth to -1,842 ft. Bobsled now holds the title of the second deepest limestone cave in the United States.
Chelsea Dau