Sounds like the swim naked place :D (fine you dont have to be naked, but there will most likely be other naked people there if that bothers you). Problem is that it has alternating days between men and women so you have to adjust your schedule to fit. Mäkelänrinne (http://www.urheiluhallit.fi/eng/makelanrinne.html), as recommended earlier, is probably the best place to go.

Finally got some snow and ice to make the running more interesting ;). Fairly warm weather also, so no problems with the cold when running.