The movement of water through the mountains is dramatically visible standing at the trailhead for Little Rock Creek: snowy peaks tower over a green, mossy drainage, leading to the empty shores of Lake Como.
Lake Como is a large reservoir used primarily for irrigation. I swam in 30 or 40 feet deep water in early summer.
Fall rains and snows are refilling alpine lakes and streams. I bet the waterfall (above) on Little Rock Creek was a trickle about a month ago.