on sidewalks. and let me tell you something about city sidewalks. they are like little hills. for miles. driveways. cracks. up and down and up and down for 2 more miles, when my it band started screaming. for the record, i used to think the it band was a made up muscle. until i started having trouble with mine. i actually stopped my watch at one point and spent several minutes stretching, which helped.
i tackled 4 more miles of this and lots of little stoplights, and running across streets when the light was red, and by mile 15, i just decided i had to finish the thing. and i was 