16+ Swampy Miles with 15 at Marathon Pace, Dark and Early

16+ miles with 15 at marathon pace. Stanky humid heater this am, dark and early. My entire outfit and sneakers were as heavy and wet as if I just jumped in a pool. Up at 3:30am, out at 4:45 for a 1.25 mile warmup into my marathon pace long run. Want to know how to run faster? Run down a pitch black,