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Hawk Mountain is a mountain ridge, part of the Appalachian Mountains, located in central-eastern Pennsylvania near Reading and Allentown. It is a part of the Blue Mountain Ridge. It is primarily known as home to the Hawk Mountain Sanctuary. Located along the Appalachian flyway, the Sanctuary is a prime location for the viewing of kettling and migrating raptors with an average of 20,000 hawks, eagles and falcons passing the lookouts every year. The birds are identified and counted by staff and volunteers to produce annual counts of migrating raptors that represent the world's longest record of raptor populations. These counts have provided conservationists with valuable information on changes in raptor numbers in North America.

The River of Rocks is visible and accessible from the Sanctuary. The boulders were formed by periglacial processes in the Pleistocene epoch, or "ice age." (Read more...)