Darton Peak. Elev. 12275 ft Bighorn National Forest First time solo climbed Wyoming 12ers. Base camped at Lost Twin Lake. Thunder storms on summit day. Original plan was going to summit 3 peaks in a day ( Mather Peak, Darton Peak and Bighorn Peak). Waited till 3 pm for storm to pass by. Decided to climb anyway. Left a tent at 3:20pm. Climbed thousand feet to the ridge and another 800 ft. to summit. It was very windy and cold.