‘Blair Witch’ was filmed in British Columbia and California, specifically in British Columbia, Sea-to-Sky Corridor, and Los Angeles. Principal photography took place in the spring of 2015, and to maintain secrecy, filming was done under the working title ‘The Woods.’ Burkittsville, where the movie’s story unfolds, is a real community in the Frederic County of Maryland, and the Black Hills forest begins just at the edge of the village.
Source: Where Was Blair Witch Filmed? 2016 Movie Filming Locations