The stand-up paddle-boarding (SUP) craze has officially swept the state, from downtown spots along the South Platte River to raging whitewater in the mountains. When you're ready to give it a try, start slow and scenic — and at the source — by renting an inflatable board from Steamboat Springs's Hala Gear and taking it out on Steamboat Lake. The learning curve is pretty shallow when you're out there standing on the lake on flat water, and the views are so spectacular that you'll be hooked from the get-go. When you're ready for an extra shot of adrenaline — and a few servings of humble pie — try some of your favorite yoga poses or running some rapids. For a few pro tips, sign up with an outfitter like Steamboat Paddleboard Adventures for lessons on the Yampa River. Buying a board will set you back about $1,500, but they're portable enough to not require a roof rack, and some models include a StompBox retractable-fin design that you'll appreciate when the river gets shallow.