Nature calls during long run / race

Just poop in the woods and move on.
Make sure to know where all the portapoties are in the race.

Maybe you can analyze the stool. Could be a problem you can treat with fiber supplements?

I was able to train my body to go every morning shortly after waking up to clear the bowls before I run. I have a cup of coffee first thing when I wake up. Then in a about 20 minutes I go sit on the toilet. Took a little time at first, but now I go every morning like clockwork.

Before marathons, after my morning dump, I take 1 Imodium before the race as a precaution. It's never caused any negative issues.

If you have lose bowls now and didn't before, I'd try to identify what's causing it. Maybe something you're eating, or a supplement, or nerves.

Try a butt plug.

I say just get a new set of tough microwave safe bowls and keep them under lock and key, and voila, no more lose bowls.

Run faster so that your run is done before the urge comes.

As someone who gets plagued by this on most regular runs, it’s usually surprisingly fine during races including marathons… I’d say backtrack to what you’ve eaten a little farther back than that morning ( personally I eat more and in a carb loading kind of way more like two days out and keep it lighter the day/night before)

I hate to say this but nicotine is great for clearing out bowels. I don't smoke typically but a puff or two on a cigarette and I pretty much have to poop immediately. Maybe if nothing else works try that.

Take a half capsule of Imodium the morning of your race or long run. Definitely test it out before your race. Be careful with fiber and dairy before races. Both can make things move a bit too quickly through your digestive system during a race.