Running's perfect for that stuff. Keep on training and it should go away. Maybe introducing more intensity (in a controlled and healthy way) would help.

P.S. Bad posture can really overemphasize the size of your stomach. Tilting the bottom of your pelvis forward and pulling your navel towards your backbone while standing/walking/laying down can help, so can lower back exercises.

One word - Pilates.

When I added pilates to my workout routine (cardio & strength training), my belly finally got flat again.

I had belly fat, too no matter how much running I did and it was because of what I ate. I hate to say this but for me, I had to feel deprived in order to lose the belly fat. I went on a strict diet which allowed carbs but not factory carbs. Whole grains and brown everything which meant no white rice, white pasta, white bread, you get the idea. I eat a small amount of wholesome carbs, lentils, legumes, etc. No more sweets, desserts, junk food, munchie-type snacks either. No more french fries or any kind of deep fried food. I eat a lot of salads and nibble on fresh fruit along with some lean proteins but a lot of days, I like eating a vegetarian diet. So in combination with running and becoming a better water drinker, the belly fat finally went away and the waistline finally trimmed down.

I tried eating "a little bit" of normal food at mealtimes and I still couldn't lose weight. It must be because I'm getting older and can't get away with that anymore. Even though dieting isn't fun, I do admit that I feel better. I no longer suffer from bloating, indigestion, heartburn and my clothes feel looser, not tight. Running's easier, too since I feel lighter on my feet and no longer land with a thud. In other words for me, it was no pain, no gain. Results are pretty darn good but it does take daily effort and not just working out.

And, you do have hope! You'll get there. It takes patience and diligence like anything else in life. I wish I could just exercise and be done with it but unfortunately, for me, it takes the exercise - diet combo in order for weight loss to work (including belly fat, thighs, etc.)

Two things that may apply to your situation:

1. Do you suffer from constipation? This question is no joke. I did for years. My stomach would be distended and hard, even though I was no where near overweight. Once I started running it wasn't any longer an issue. But I also decreased the amount of some foods I was previously eating a lot of, like cheese, that I believe contributed to the problem. I still try to watch my cheese consumption, even to this day.

2. Do you perform weight bearing exercises (strength train) for your core? My experience, and that of a good running friend, was that performing ab exercises actually made our stomachs look bigger than before the exercises. Of course we realize that this resulted from enlarging the ab muscles, but still it annoyed us. I have another good friend who is a serious weight lifter (she competes in fitness competitions) who says that weight bearing exercises on the mid section can make the stomach bigger on some people. Also, I've read in more than 1 book on strength training that you should not perform weight bearing exercises for the obliques (side ab muscles) unless you are aiming for a bigger (not smaller) mid-section.