Chicago Lakefront Trail

20mi long run along the Lakefront. Cooler temps but humid. My Garmin battery died at the 6mi mark, so I relied on the Lakefront mile markers. I ran from Montrose Harbor to the 11.5mi marker past McCormick Place and back which should be just a little over 20mi. Finally little pain, but forgot my morning bagel, so around mile 18 it was quite a struggle.