We'd go skating in the winter, swimming in the summer, "hanging out" all summer when I was a teenager, fishing and canoeing, they have a bandshell for watching concerts on summer nights. And they make the BEST popcorn EVER. Nonthing compares to Lake Harriet popcorn. The best part is - when I was there a couple years ago in the summer, I got a box and it tastes EXACTLY like it did 20 years ago. This is a late fall shot.
Oh, and my parents live a 10 minute walk away so no wonder we spent so much time there.