ISPO.com gives an overview of the equipment for the relaxed water sport, what the fun costs, and everything you can get up to with a board and a paddle.
What do I need for stand up paddling, and what will it cost me?
Winter SUP – recommended by winter SUP experts Mario and Manuel Stecher for the colder time of the year:
Where can I get on the water with my board?
Everywhere, actually. No matter whether lake, river, or sea. You can race off on your way on any body of water with your SUP board. For more advanced riders, frozen water (i.e. snow) is even feasible as a navigable surface.
If you've never stood on an SUP board before, or want to improve your skills, get an overview of current courses here.