The Triangle, Chatham Conservation Land is primarily a pitch pine and oak forest. It is reserved for conservation and recreation purposes. There is a vernal pool located in the southwestern portion of the property.

A smallpox cemetery from the 1700s is located in the northwestern area of the property near Old Comers Road. An interpretive sign explains the history of the site.

A trail loops the property and includes a segment of the Cape Cod Pathways trail system. Yearly trail maintenance occurs with assistance from AmeriCorps service members. There is a stand of invasive species on the eastern property border that is considered a management priority. In 2013 AmeriCorps members assisted with clearing invasive honeysuckle and bittersweet.