I'm pretty much in line with Vic. I couldn't tell you how far away they are and if I stopped to figure it out, I'd just mess up my shot. I have taken game (ground squirrel) out to about 40 paces (my brain don't work in yards) and my closest shot was danged near point blank on a hog.
I agree that you might want to go do some stump shooing, although I wouldn't recommend actually shooting hardwood stumps. Cedar gooood, Oak BAAAD!!!

This will help you to sharpen up your shooting eye under hunting/field situations. Like, hmmm, if I shoot at that clump of grass, will my arrow hit that branch that's hangin down between me and the target? Good question, lets try it and see. (note: use old arrows

)
The important part in all of this is that you have a good time while you're shooting.