A trail camera at a home in Montoursville, Pennsylvania caught the uninvited guests.
Police say four young women were trespassing when they used a hot tub without permission, late at night.
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Investigators posted the pictures on social media.
Within 15 minutes, tipsters identified them.
Neighbors say they're glad more people have cameras out and on at night.
Elizabeth Labacher, a Montoursville Resident said "Trespassing when you're twenty-years-old and in both of our opinions they are kids, but they also know not to do something like that."
Resident Steve Sheare added, "Thirty-some years ago, I'm glad they didn't have cameras, have that stuff, because I was a teenager, too."
There's no word yet if the hot tub hoppers will be charged.