I can't stand people who don't trim their hedges or shrubbery and allow it to grow over the sidewalk. It's really not fun having to dodge branches on a stupid sidewalk... especially when you are also allergic to beestings and fear running too closely to any plantlife! Must we worry about plants, too?! - Discruntled runner

I agree re the dogs. I'm regularly harrassed by loose dogs on my route, I've taken to carrying a stick and if they come near me, they'll have a concussion.

These are all so funny but very true...my biggest ones:

-Smokers. I can't stand breathing in second hand smoke in general, but while I'm running it's 10 times worse.

-People crowing a path. Typically the groups of 3-4 female walkers deep in conversation...it's so frustrating when they look at you running toward them and completely ignore the fact that there's no room for you to get by.

-People who yell things out their car windows...or throw things.

-And I'm in total agreement with the dead animal thing...especially ones that have been there a while. Being out of breath and then trying to hold it as you pass that repulsive smell can be tricky!

i hate coming up on someone on a bicycle on the sidewalk.  What are they doing on the side walk in the first place and then they expect you to move out of their way.

Trees that hang so low over a side walk that a walker has to avoid them, also bushes that encroach the sidewalk.

Dead battery on my Ipod (I know it is my fault)

It use to drive me crazy when people stared at me when I was running through a residential neighborhood as if to say "what is that guy doing" or "is he being chased." Now I actually smile and enjoy it because I realize I'm doing something positive for myself and take pride in it.

The only thing that gets me now is breathing in bad car exhaust and all the goose "droppings" on the trails where I run.

Too many people complain when they should be grateful. If your a runner you already know what can be annoying. How about a less negative approach and ask what the best things are about running. If you actually have the ability to run you shouldn't complain.

Being blinded by a car with its brights on when I run after dark.