The lichen biota of North America is poorly documented in many areas, including many of Canada's national parks. For example, Forillon National Park in Quebec, Canada had no previously published accounts of its lichen biota. Therefore, we conducted a comprehensive survey of macrolichens and calicioid lichens and fungi in the park to establish a baseline species list. We discovered 170 taxa in the park (169 species and two subspecies in 48 genera). One species, Melanohalea exasperata, is a first record for Canada; three species, Calicium denigratum, Sclerophora coniophaea, and Scytinium teretiusculum, are new provincial records; two species; Chaenothecopsis oregana and Parmelia fertilis, have notable range extensions; and one species, Sclerophora peronella, is listed as 'special concern' under Schedule 1 of the Canadian Species at Risk Act. We present annotated checklists and identification keys to the macrolichen and calicioid species of Forillon National Park.