For those of you doing an IM this year this event might be interest: https://www.activeglobal.com/swimming/c ... eries-2014
It's a 4km (there is a 2km option) sea swim off Killiney Beach. Good practice for Roth, if you can do 4km in the sea 3.8km in a lake will be no bother to you. I'm doing it. Entry closes in a couple of days. It's €25.