Full disclosure: this is not the main channel of the Rhine, it's a little offshoot. (The "real" Rhine, just through the trees, was not frozen.) Also, Hannes was the only one who skated - I didn't have any skates. Instead, I slid around the ice with my hiking boots, which was probably almost as effective as if I'd had skates since my ice skating skills are pretty poor.
Though freezing cold (duh), it was a beautiful day out and I felt so lucky to be out there with a local who was in the know. We might not have found this little skating area if Hannes hadn't run into an old friend who told him that people were gathering to play hockey.