For all those who don't think an accurately measured course is important, then join me for my Chicago Half Marathon. We'll call it Jon's Half Marathon.
What I provide for you is basic directions on how to get to the Lincoln Park. You can measure your own course along the lake, via a web based measurement service or your own GPS or pedometer, get refreshments along the way at the various water fountains or lakefront bars at North and Oak beaches, or raid the coolers of various picnickers.
Afterwards, a post race party and barbeque as long as you bring your own supplies.
And, it's all "free".