Whenever out-of-towners venture to Boise, the tour guide in all of us kicks in and we consult our go-to list of things to do in the City of Trees. Near the top of the list, of course, is a float down the Boise River--specifically, the stretch from Barber Park to Ann Morrison. But we think we may have found something to top it: spice up the float with a couple of rented stand-up paddleboards. It only takes a few minutes to overcome the giddiness and get comfortable on the 10-foot boards. Not to worry, the ripples and rapids are easy in a kneeling position. Really, it doesn't get much more novel than exploring the city via river, via SUP.