Clouds, sun and shadow accentuate the rugged topography of the northwest rim of the San Fernando Valley.

Castle Peak is the rock-capped summit on the left of the photo. Chatsworth Peak (2314′) is in shadow and behind Castle Peak. The prominent rock bands are Chatsworth Formation sandstone formed more than 65 million years ago. Oat Mountain (3747′) is the sunlit peak in the distance.

From a run on Wednesday at Ahmanson Ranch.

Some related posts: The Cave of Munits and Castle Peak, Castle Peak, Snow on Oat Mountain