I personally have not participated in any of these courses, but I have had the pleasure of running the trails at Fanshawe Conservation Park. This event offers a 5.5km trail run as well as your standard road races of 5k, 10k and a 15km race. Chip timed and a race bib. Keep it simple with a great Sunday morning run and a way to work out some of your race day worries.
Check out MEC Events http://events.mec.ca/event/11577/mec-london-race-three-5km-10km-15km to get all the details.
See you there.
Love Life and Live it!