2013 in Nevada - Portuguese Mountain

We arrived at the summit to find this heading our way. I looked at Dennis and he looked at me before we said "lets get out of here" since that black cloud had some lightning bolts in it. We literally ran off of the summit and dropped 1000 feet in what seemed like minutes. As a result, very few pics were taken but I did manage to sign the register as did Dennis. The storm chased us most of the way down the mountain.