This park is great. I've been going here for two decades now and it's a very relaxing place to be. I personally like cuddling up to the trees with a book but you can do much more than that.
There are plenty of playgrounds for young children and tons of fields to play sports in. It's also a great place for picnics and weddings. I have seen quite a few wedding parties there.
I personally like using the hills for ice block racing. They are great!