Jeremy -- thanks for pointing out the noise. I thought about it at the time of capture. Light changing fast, no time for a tripod, upped the ISO. I am surprised by the amount of noise at ISO400 on the 50D.
Yes, the close-ups call sand to mind, but the big picture feels oceanic to me.
Paulo, Francois -- thank you. I agree about the mountains. Better break out the tripod and get some DOF.
Terry, yes the close-ups were after sunset so I have held off on the brightness. I'll have another look with your comment in mind.
Enjoy the seashore, Chuck!