This is a great park to stretch your legs. I love the walking (jogging, biking) path. Actually, you can start here and go for quite a long walk. I find there aren't a lot of people out in the mornings on the weekdays.
Even in the summer, it isn't overwhelmingly hot if you come out before 6 a.m. or just when the sun is starting to come out. It feels so refreshing with all the green grass and the lake. Great place to be for a brisk walk.