South of the fields, the park angles southeast, and becomes more of a deep, naturalized ravine with steep sides, with a heavily used footpath down the middle.

The path is heavily used and remains passable even in winter, with foot traffic packing snow down despite the lack of plowing, especially after drainage works in 2006 fixed water pooling and subsequent ice buildup.

The Glen Cedar bridge that spans the ravine portion of the park was built during that time and restored in 1989, after being rescued from demolition.

In the 1960s and 1970s, there were plans to build the Spadina Expressway through Cedarvale Park but Jane Jacobs successfully lobbied against the government to halt its construction project.

Cedarvale Park is located on the right-of-way for the cancelled Spadina Expressway south of Eglinton that was transferred to the province of Ontario in return for the building of Black Creek Drive.