After talking with Justin Lichter, Kevin Sawchuk and Ryan Jordan about the joys of cold water swimming, I gave it a try a few weeks ago. I hiked half a mile to a narrow reservoir, swam about 50 yds across and set up camp. I did an out and back hike to arrive back at the reservoir two days later and swam across at another spot – about 75 yds. The first swim air temp was 47, and 37 the next. I don't know water temp. It's a reservoir so not that cold, although the two days of rain before the second swim may have cooled the water. I wore only neoprene socks the first swim. I didn't shiver or even get chilled. Putting on completely dry clothes after the swim, only my toes were cold and they warmed up after about 20 minutes just from setting up camp. Great experience, but time consuming undressing and redressing. The second swim I wore all my hiking clothing. I was already wet from the waist down from a stream crossing and my car was only a half mile up a hill from the reservoir. I had on rain pants and jacket. I even kept on my rain mitts. I thought they might work as paddles, but filled with water even though the cuffs are quite tight. All that clothing definitely slowed me way down. It seemed to take a long time to cross. My feet were numb (I had on trail runners and ankle height wool socks.) I was quite cold still when I got to my car, I doubt I could have walked myself warm. (It was still raining too.) I would have had to set up camp and get into my bag I think to warm up. From this little bit of data, in the future if I had the time I'd strip before a crossing. Other wise, I think I'd wear what I was hiking in from the waist down, but only wear my base layer on top. If I had on rain pants I wouldn't bother taking them off – figuring they would quickly drain and dry while hiking and keep the wind off as my pants dried. I'd put on some kind of wind or rain jacket once I started hiking again.
What do you all wear for swim crossings?
How about swim technique? I had the very buoyant Arctic pack. It didn't work to float on top of – too hard and round, but dragged along very easily. I thought it might work to wear it (just shoulder straps). Both arms would be free to paddle and it wouldn't weigh me down. I didn't try that though. I hooked one arm through a strap and got some use from that arm for swimming and full use of the other arm.

