In the 30 minutes or so I spent in the San Rafael Grasslands, it went from blue skies with puffy white clouds, to being completely covered over in threatening clouds, and then rain. This shot shows the rainstorm coming in fast.
Beautiful walls of Cave Creek Canyon in Southeast Arizona.
This is a particularly beautiful rock formation making up the sheer canyon walls of Cave Creek Canyon in SE Arizona. The yellow-green is a lichen that grows on the canyojn walls.