Soon, the destiny of your former hat, along with everyone else’s, is far from mind—except for one special team at Yellowstone National Park. So far this year, the National Park Service geologists at Yellowstone have recovered over 300 lost hats from hydrothermal areas. Yellowstone National Park Geology Program volunteer Tara Cross smiles and shows off a pizza box found on Geyser Hill in Upper Geyser Basin. “When recreating or working in Yellowstone National Park, it’s not uncommon to stumble across a team of National Park Service geologists in distinctive red safety vests. CREDIT: National Park Service photo by Samantha Hilburn, August 2025.