The canyon has a creek at its bottom that supports a narrow strip of riparian woodland dominated by sycamore trees, while the slopes are covered in coastal sage and native and non-native grasses.

Because the Whittier Hills has a relatively close proximity to the ocean, which has an equalizing effect on the climate, it is somewhat cooler here than some of the areas just south of the region.

In November 1900, two oilmen in their wagon were chased out of the canyon by two large cougars as their horses panicked.

[7] Since then, Turnbull Canyon has developed a strange collection of various myths and urban legends, including tragic murders.

[8][9] Turnbull Canyon is known for the view it provides of the Hsi Lai Temple and Rose Hills Memorial Park.