Watch the Dirtiest 'Bachelor' Challenge Ever!

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The remaining ladies of The Bachelor are getting pushed to the limit on Monday's all-new episode, and we have a sneak peek.

Contestants have to put on a wedding dress and sprint in the mud if they want to stay in the running to become Chris Soules' bride. Being the farmer that he is, Chris doesn't mind getting a little dirty, but the girls might be singing a different tune.

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"I don't think you can ever prepare to do a mud race in a wedding dress," contestant Becca said.

"It's pretty much the saddest thing ever," Carly said. "If we lose we have to go home and the winner gets to go on a one-on-one date with Chris."

While there's a lot at stake for the ladies, fortunately it looks like love is in the air.

"I'm optimistic that my future wife could be in this group," Chris told ET. "They're all so great that it's hard to really know which one is right for me. I'm hoping to get a lot more time with them to sort this out."

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The Bachelor airs Mondays at 8 p.m. ET/PT on ABC.