Feather Falls frozen in time

I cropped this picture out of a much larger TIF file generated from a

RAW file. I was also close to the limit of my 10X optical zoom, as

well. I'd like to be able to enlarge this up to the largest size I

can and I'm worried about losing too much detail (more than I've

already lost). Is there any advice on sharpening you could give,

given that there's so many ways to enhance sharpness in Photoshop? (I

have Elements 5.0).

Any other thoughts on aesthetics?