Thanks Chris for your complements.
I 'd love to take a credit of post-processing for blurring but I can't. I didn't do any blurring effect in PS.
I don't know why it's blurred but assume it's from long exposure and the wind.
It looks much like motion blur.
Just for fun you might want sharpen the path and the rock a little more to see what it does.
EDIT: I just tried it and blended the sharpened layer in soft light mode with selection of rocks and path only - I think its an option.