I'd been nude around the house for quite a while, but usually on my own (other than "normal" nudity with my family - bath time, changing rooms at the swimming pool etc.).  I'd been longing for an opportunity to strip off outdoors - the closest I'd got at this point was standing in my back garden at 3am....(it was pitch black, so I don't really count this occasion LOL).
Anyway, it was when we'd had the heavy snowfall earlier this year; I decided to take a walk and see if I could get some decent photographs of the area near to us....it's very picturesque.  I arrived at a very secluded spot and just decided to take my clothes off.  The cold air on my skin was invigorating, and the thought of being spotted terrified yet excited me.  I continued taking some photographs for about 10 or 15 minutes before deciding to get dressed again.  My only regret was I didn't take any pics of myself outdoors - my wife was at home and when I returned she asked to look at my photos, so it's probably a good job I didn't LOL.  I can't wait for a similar opportunity.....