I ran this course in August 2014. First off, the addresses for the parking sites given by TraiLink are inaccurate. Second, I started my run by the parking lot of Woodland Park in Morton, IL. If you look on the map, the route to East Peoria takes a right at the T. I took a left and made it through the end of the course into a Morton neighborhood. Shame on me for forgetting the map, but that highlights the main problem with this course: it is barely marked with mile markers or any other signs identifying the course. I got as far as the Water District Office in EP, but I couldn't find the markers that connected the rest of the course; I later found them on the drive home.
Other than the lack of markings, this is a good, fast road course. There is a mile long stretch after the 4.5 mile marker (going from Morton to EP) tha goes downhill, but on the return from EP to Morton it is a long uphill climb.
Pluses: Good fast road course with a mile long downhill/uphill. Minuses: Some course markers, but you have to look for them at both ends and the street crossing after the W.D. Office. Hardly any mile markers, especially after the 4.5 mark in Morton. Also IRT the neighbors you may encounter: I ran this early in the morning and adopted a stance of "I don't bother you, you don't bother me" and I was fine.
BTW: make sure you have empty bowels and bladders before you step off: there are no close-at-hand/visible portajohns on the course. Maybe at the parks in Morton or EP, but you'd have to go off the trail to look.