Mont-Mégantic National Park is a provincial park in Quebec, Canada. It is located near the municipality of Notre-Dame-des-Bois in the Estrie region. The park was created in 1994 and is adjacent to the Samuel-Brisson Ecological Reserve which is located northeast of it. Mont Mégantic is the approximate geographic centre of the park. Located at its peak is the Mont Mégantic Observatory, which is the most important astronomical observatory in eastern Canada.