The historical role of fire in shaping sagebrush ecosystems remains poorly understood, yet is important for informing the management and conservation of sagebrush landscapes and obligate species such as the threatened Gunnison sage-grouse (GUSG; Centrocercus minimus). To gain insight into the historical role of fire in sagebrush landscapes of the Upper Gunnison Basin (UGB), we reconstructed the historical (1424-2001) frequency of low-severity fire...