Lake Stanley Draper is a treasure in the metropolis of Oklahoima City. This urban wilderness has over 13 miles of trailz just begging to be run. A blogger and runner friend Julie has an awesome blog, and I took the liberty of borrowing a picture of the trail taken on a warm summer day.
This map from Google should get you to the trailhead.
Click here for some info on the course, a printable map, and several trail review--from a mountain biker's perspective.