The Horn River Shale is a geological formation located in northeastern British Columbia, Canada. It is primarily composed of fine-grained sedimentary rocks and is known for its rich deposits of natural gas. The formation is part of the larger Montney Formation and has gained attention for its potential as a source of shale gas. This formation is significant for the energy industry, as it has been a focus of exploration and production activities. Advances in hydraulic fracturing and horizontal drilling technologies have made it economically viable to extract gas from the Horn River Shale, contributing to the region's energy resources.