Pilings Under a Bridge

My plein air group went back to Torrey Pines State Reserve today for a last session at the north side. Pedestrians can access the beach by walking beneath an enormous bridge supported by massive pilings. I went planning on painting a beach scene, but as I walked beneath the bridge I was captivated by the size and sweep of the pilings.

This is a 17 X 12-inch gouache sketch on black paper.