Pleasant Valley Wildlife Sanctuary is a 1,405 acres (569 ha) wildlife sanctuary located in Lenox, Massachusetts owned by the Massachusetts Audubon Society.

There are 7 miles of trails and a large pond on Yokun Brook.

The Overbrook Trail leads to the summit of Lenox Mountain (2126 feet).

[1] Pleasant Valley has an outdoor summer day camp, seasonal special events, and year-round educational programs for preschoolers to adults.

[2] The sanctuary was founded in 1929,[3] when members of the Lenox Garden Club established a new organization, the Pleasant Valley Bird and Wildflower Sanctuary.