Cultural landscapes also include those that are vernacular in character: vast landscapes associated with historic overland migration, hard rock mining, and rural districts comprised of agricultural settlements and ranching enterprises that have been in continuous operation for more than six generations. Important historic sites include the homes of individuals significant in American culture, such as American naturalist John Muir and American playwright Eugene O'Neill, and battlefield sites associated with the Indian Wars of the 19th and 20th centuries and World War II. Many landscapes across the region convey the cultural heritage and sense of place for the African American, Asian American, Latino American, Native American, and Pacific Islander communities.
The condition of the landscapes is a reflection of the type and location for many of these properties. This is especially true of the large scale vernacular landscapes in remote locations, such as backcountry mining landscapes, working dairy ranches, and military ruins. The primary impact affecting the condition of these cultural landscapes is long-term environmental exposure and climate change, creating both rapid loss of features and the sometimes slow decay or loss of integrity to natural systems that define the significance of the landscape.