The Bolton one is a pretty awkward but fun course at Leverhulme Park. It's got about five different surfaces (track, rough tarmac, smooth tarmac, compacted earth and off-road) and as soon as you leave the athletics track you go every which way - up, down, left, right...and even on the "out and back" section there's a slight hill in it which can catch out the unwary runner.
You do have a rather bothersome climb to deal with on the southern loop - twice! The second time is in the last kilometre then you've got a flat but twisty section on smoother then rougher tarmac before sharply turning onto the track.