Calling all river rats: Colorado-based 4 Corners Whitewater is offering 50 percent off its domestic rafting trips departing during the month of May. Options range from a two-hour float through downtown Durango to a three-day raft 'n hike combo—but if you ask us, the "Two Day Wilderness Overnight" is the way to go. Put in way up in the San Juan Mountains, just outside the historic mining town of Silverton (pop. 500, give or take), and follow the Upper Animas River for two days of Class III, IV, and V rapids—plus breathtaking views of the Weminuche Wilderness all around. You'll camp in an aspen grove near a century-old miners' graveyard (warning: river guides love ghost stories) and take out at Tacoma just in time to catch the famed Durango & Silverton Narrow Gauge train to Durango ($245 with the 50 percent discount; price includes all camping and rafting gear, meals, and the one-way train ticket).