Anaxyrus boreas, commonly known as the Western Toad, is native to western North America. Its geographical distribution includes regions in the United States and Canada, primarily found from southeastern Alaska through western Canada, including British Columbia, and throughout the western United States down to Northern Baja California in Mexico.

The Western Toad inhabits a variety of environments, typically favoring areas near water sources such as ponds, lakes, and streams, which are essential during their breeding season. They can be found in diverse habitats including forests, grasslands, and deserts. The species is adapted to various climate conditions, from coastal rainforests to arid desert landscapes.

Western Toads are amphibians that occupy a role as both predator and prey within their ecosystems. They primarily feed on insects and other small invertebrates, helping to control insect populations. In turn, they are prey for larger animals, including birds, snakes, and mammals. The presence of Western Toads in a habitat can be indicative of a healthy, balanced ecosystem.