In late February, I walked into a Bigfoot trap in Siskiyou National Forest a few miles north of the California border with Oregon. Posing for a photo inside pretending to be an oversized cryptid, I raised my own overly large foot for effect. A year ago I moved to Arcata a veritable epicenter of Sasquatch sightings " where Bigfoot-themed businesses, adornments and paraphernalia are commonplace and undoubtedly a tourist draw and economic boon to the area. A scrap metal Bigfoot sculpture stands on a walking path in my town. The sheer concept of Bigfoot is fascinating, which is why I hiked to that trap, and why, when a friend recently mentioned an "Intro to Bigfoot Studies" online class with an instructor from Humboldt State University's Osher Lifelong Learning Institute, that seemed like fun. Here's something not fun: having to question your own grip on reality. And actually, that's part of why some people have a tough time acknowledging the possibility Bigfoot could be real, according to course instructor Steven Saint Thomas. "It's a natural human tendency to want to be comfortable," Thomas says. "So information that makes you uncomfortable is information you prefer to ignore." And here's what many Bigfoot enthusiasts do think proves the existence of the creature: the Patterson-Gimlin film. It was shot by two cowboys near Bluff Creek in 1967, capturing what appears to be a female Bigfoot striding across the forest, turning toward the camera in what has become an iconic stance, and disappearing forever.