I love the track, it is a great place to be outside and get in a great circuit style workout. The distance is easily marked and allows you to just go. For today's workout we are running the straights and walking the curves. Really push on those straights, this is a chance to work on speed and pay attention to your form. It is easy to focus on fast and good form for such a short distance.
We are also throwing in push ups and lunges. Our first round calls for uneven push ups. Pay attention to your shoulders on this. Uneven push ups are a great exercise for your shoulders, but don't strain them or try to push through something that hurts. I have a lot of clients that do this exercise on a wall or at an incline, feel free to play with it and find what works best for you.
Above all, try your hardest!