The walk around the Lake is 6km and will only take 1.5 hours. Even on a day trip this is more than achievable. Do this is in a few stages, stopping to enjoy the lake views at a cafe.
"maybe WAS the best pizza in Istria, in '96, when their "famous" article was published, but today (2013), i must admit that it didnt convience me. you can find better one's around the corner."