Frostburn (Frostburn - official site), a winter celebration of art and community in Western Pennsylvania, near Pittsburgh. The regional burn promotes the Ten Principles of Burning Man in a harsh environment, highlighting the need for community members to collaborate against severe weather to create and install interactive art and theme camps. A gift economy is encouraged, while commercial activity is generally prohibited. Frostburn participants are expected to actively contribute to the spirit of the event in radically expressive (but socially responsible) ways, leaving no trace of their presence after the event has ended. Frostburn took place for its first five years at Cooper's Lake Campground, which also serves as the site of the annual Pennsic War (the largest annual event of the Society for Creative Anachronism). For the next two years, Frostburn was held Camp Kevin, further north near Brookville, PA, before moving south to Marvin's Mountaintop outside of Masontown, WV for 2015. Frostburn happens yearly during Presidents Day weekend in February.