Change it up and run somewhere other than GGP and the city.
Ill be running 3.5 out and back to avoid the hill, on this relatively flat (until mile 5, which has a good size hill or two)trail. Its paved but has a dirt path along the side of the pavement most of its distance. Its also marked every 0.5mi.
If you need a longer run this trail can satisfy that too. Its 6 miles long with the mile markers and goes even further without them.