Author's Notes:

The Equestria Girls go for a hike in the woods, when they suddenly have to poop very badly. Will any of them make it? Who will last the longest?

I did this story by request.

The Equestria Girls were going for a hike in the nearby woods in Pinkie Pie's neighborhood. Sunset Shimmer was wearing gray shorts, Twilight Sparkle (of the human world) was wearing purple shorts, Rainbow Dash was wearing her usual skirt and skintight black shorts, Fluttershy was wearing her usual green skirt, Applejack was wearing jeans, Pinkie Pie was wearing jean shorts, and Rarity was wearing her purple shorts, feeling they would be the best fashion choice for a walk in the woods.

As they walked, Rainbow Dash talked about how she dominated her latest soccer game, Fluttershy interacted with every bird and squirrel they could find, Pinkie Pie told funny jokes, Rarity admired the view while Applejack took pleasure in "roughing it", and Twilight and Sunset talked about stuff.

Until, a very uncomfortable urge hit all seven of them at once. They had all had a big meal at a restaurant a few hours ago, and something in it hadn't quite settled well with them.

At first, their stomachs were gurgling. Rainbow Dash and Pinkie Pie initially thought it wasn't as bad as it would turn out to be, and giggled a bit.

Sunset and Applejack could feel a stomach cramp, while Rarity's stomach gurgled very loud, causing her to blush.

"Um... I'm not feeling too well," said Fluttershy as her stomach gurgled.

"Neither am I," said Twilight, who was also getting a stomach cramp.

Pinkie Pie felt another stomach gurgle, which was a little bigger than she had anticipated. This might be more serious than she had thought. Or not.

"Urgh..." said Rainbow Dash as her stomach began to cramp, and gurgled louder and longer.

Then, Pinkie Pie farted loudly. She and Rainbow Dash laughed, and Rainbow Dash lifted a leg and farted even louder.

"Really, you two are so..." Rarity was cut off by loud, wet fart from her own rear, and blushed.

Applejack farted next, looking unashamed but uncomfortable.

PFFFT! BRRRRT! PRRRRT! BRRAAAP!

Twilight and Sunset farted a few times, blushing with embarrassment, but not feeling as bad knowing the others were experiencing the same.

Fluttershy let out a quiet, airy fart. She blushed, but no one heard.

Rarity closed her eyes shut tight as she felt a big gurgle, and then...

PPPPPFFFFFFFFFFRRRRT!

Rarity blushed as a loud, wet fart made its way out of her butt.

Rainbow Dash and Pinkie Pie, meanwhile, were having fun farting, until they suddenly felt what they had been dreading. They had to do more than just fart.

All of them needed to take a crap. Bad.

"I gotta go poop!" said Pinkie Pie.

"Me too," said Rainbow Dash. "Real bad!"

"So do I," said Applejack.

Twilight and Sunset showed their desperation by groaning. Rarity and Fluttershy didn't want to admit it, but it showed in the discomfort on their faces, and the way they moved.

"Well, only one way to loosen the pressure!" said Rainbow Dash.

"And that would be?" said Sunset.

"Fart a little bit!" She lifted her leg and let out a loud wet fart.

"Ugh," said Rarity, wrinkling her nose in disgust.

"No, she's right," said Sunset. "It might help." She farted for about three seconds, blushing but feeling a little better.

Fluttershy released a quiet but audible fart. It was embarrassing, but it wouldn't be as bad as messing herself.

Twilight let out three moderately quiet but wet farts, giggling nervously. Applejack farted a little louder. Pinkie Pie giggled and farted very loud.

Rarity felt the intense pressure in her bowels increase. "Oh, fine, if it'll keep me from soiling myself..." She let out another loud, wet fart, feeling ashamed, but admittedly a little better.

As they walked, they continued to fart every minute or so, until Pinkie let out a boisterous fart and thought she had made a mess in her shorts. She quickly put both her hands on her butt. Her shorts felt a little wet, but there was no mess in her panties. Still, she knew she wasn't going to last much longer.

"I can't hold it anymore!" said Pinkie. She ran slightly to the side, pulled down her shorts and panties, squatted down, and let go. Everyone except Rainbow Dash looked away as a very wet brown mess noisily made its way out of her butt. Pinkie sighed in relief, making the others more uncomfortable, as did the smell. Once she was done, she pulled her panties and shorts back up. Her rear end still felt really dirty, and she scratched herself. She'd have to change her underwear, but at least she had avoided a humiliating accident!

"I could never do... that... out in the open!" said Rarity.

"So?" said Applejack. "I'm goin' behind a tree. Maybe you could do the same." She stepped behind a tree, desperately trying to undo her jeans. A wet fart made its way out of her, and she became more desperate, but eventually got her jeans and underwear down, and emptied her bowels. Three logs made their way out of her anus, after which she felt much better. She pulled her pants back up and rejoined the others. "Anyone else need to go?"

"I'm fine, thanks," said Rarity. "I don't want to do that outdoors."

"I can hold it," said Twilight.

"I think I can too," said Sunset.

"I can hold it longer than all of you!" said Rainbow Dash, farting a few times.

Fluttershy didn't want to say anything.

They made their way back the way they had come, hoping to get to Pinkie's house so they could relieve themselves at a toilet. But it was 20 minutes away, and the farther they walked, the more desperate they became.

"Uhhhh," said Sunset. "I can't..." She ran behind a tree.

"Oh, she's going to do it to?" said Rarity. Her every instinct told her it was the best choice, but she really didn't want to.

Sunset pulled down her shorts and panties, got into position, and let the poop squeeze out of her ass, piling up behind the tree. Sunset felt foolish doing this, but she knew she likely wouldn't have made it otherwise. Despite the smell that had entered her nostrils, she couldn't deny the relief she had been waiting for.

Twilight farted again, and listening to Sunset's sigh of relief was the last straw for her. She quickly ran behind a tree on the opposite side of the path as Rainbow Dash, pulled down her shorts and panties, and let a wetter, noisier mess cascade out of her butt and onto the grass below her. She blushed, sure they could all hear it, but she felt much more relieved.

When both girls were finished, they pulled their shorts back up and rejoined the others.

Rainbow Dash, Rarity, and Fluttershy grew more desperate by the moment, farting every few minutes.

Rarity groaned after a particularly wet fart. "That's it. I can't... Wait right there!"

Rarity ran behind a tree, pulled down her shorts, and was about to let go when she realized her underwear was still up. It was stained brown a little from her last fart but otherwise unharmed. She pulled her panties down and released the contents of her bowels.

PPPPPPBBBBBLLLLSSSSH!

Rarity blushed at how loud it was, and the fact that she was taking a dump outside, near her six friends, and couldn't stand the horrid smell that was becoming stronger, but as the wet, muddy mess began piling up on the grass about a foot under her, she felt much better, and let out a sigh of relief. Once she was done, Rarity was about to pull up her shorts, when the second wave loudly burst out of her, to her surprise. She felt a little embarrassed, and could hear Pinkie Pie laughing, but at least she didn't soil herself.

Once she was sure she was done this time, Rarity pulled up her shorts. She farted again, and gasped, but when she put her hands on her butt, and could feel no trace of a mess, she relaxed, and sheepishly walked back to the other girls. "Let us never speak of this again."

The pressure grew heavier for Fluttershy, and she wasn't sure she'd make it to Pinkie's house. But she was too afraid to go behind a tree. Maybe if someone else did at the same time. But the only other girl who hadn't relieved herself yet was Rainbow Dash. She hoped Rainbow Dash would hurry up soon.

Rainbow let out about five more wet farts. Then came a sixth, longer, wetter fart. Rainbow Dash quickly felt her butt. There was no mess in her shorts, but they were a little wet.

"You win Fluttershy! I can't hold it any longer!" Rainbow Dash ran behind a tree.

This was it. It was now or never.

"Um, I'll do... what she's doing," said Fluttershy, and she ran behind a tree. The other girls wouldn't give her a hard time for it. They all did the same thing.

Rainbow Dash got her shorts and underwear down, hiked up her skirt, and with a loud PPPPPBBBBBRRRRRRRTTTTT, she pushed out everything she had been holding in. A wet, smelly pile of crap started to form under her, and she had to stand up a little more so the top of it wouldn't touch her butt.

Fluttershy, meanwhile, got her panties down, hiked up her skirt, and let about five logs fall from her butt onto the grass. She felt greatly relieved, not only because she finally got to go without making a mess in her underwear, but also because it was silent, so even if Rainbow Dash wasn't farting the whole time, no one would be able to hear her. It still smelled bad, but Fluttershy could handle it.

Rainbow Dash finished after Fluttershy, and stared at the brown mess she had made on the ground, feeling proud of herself, for she was sure that her pile of crap was bigger than any of the others.

She let out another wet fart. And another... and another...

Realizing what was happening, Rainbow quickly pulled her shorts and underwear back down and let the second wave burst out of her, adding to the big heap of poop on the ground. This was louder than before, so that all the girls could hear it. All of them except Rarity giggled, even Fluttershy.

Rainbow thought she was done, and was about to pull up her shorts, when another wave hit, and she released a third, much wetter, equally loud mess out of her butt. The smelly mountain was starting to get taller, so she moved a bit to the side, in view of the other girls, all of whom looked away except Pinkie.

"Ahhhh," sighed Rainbow once she was done. She lifted her shorts back up and rejoined the others.

PPPPPPPPPPPFFFFFFFFFFFFFRRRRRRRRT!

A long, boisterous, wet fart made its way out of Rainbow, and she put both her hands on her rear end to make sure she hadn't made a mess in her shorts. The butt of her shorts was wet, but otherwise fine.

"Are you all right Rainbow Dash?" said Sunset while Pinkie fell on the ground laughing, accidentally letting a few farts of her own.

"Don't worry," said Rainbow. "I didn't soil myself. It was just an ordinary fart." She laughed while Rarity gave her a disgusted look, but let it slide because they had heard her fart almost as loud.

All feeling much more relieved, the girls resumed their hike. None of them farted again for the rest of the trip. Their underwear was a little dirty - especially Rainbow Dash, Pinkie Pie, and Rarity - but they preferred it to a full-blown accident, and changed into clean panties when they got home.