The second thing I noticed about the river was the incredible color of the stones beneath my feet. Though the dominant hues were various — dark and light shades of lavender, violet and magenta — there were also hues of green, blue, gray, yellow, red and brown. Most of the stones were solid colors, ranging in size from a pea or marble to the palm of my hand to a men’s size 15 workboot. But there were striped, mottled and speckled rocks as well.