It was pretty windy out, but the swimmers didn't seem to mind.
"This is Howling at Hamilton," said Humane Society of the Palouse Board Member Emily Spellman. "It's our fifth year doing it and the city of Moscow allows us to bring our dogs in."
For a small fee, dog owners can bring their pet to the pool for an afternoon of swimming and socializing.
"I like to come out and see everyone," said attendee Megan Nelson. "Duke loves it, he gets to swim and play."
There's even a contest to see whose dog can jump the farthest.
Heidi Mills brought her dog Clover for a birthday celebration.
"She's four today so I just wanted to bring her out and have a good time in the water," said Mills.
The city doesn't mind lending the pool out for the day because it's already closed to humans. So the dogs get to make a splash before the water is drained for the winter.
Howling at the Hamilton is fun for the whole family, but it's also a successful fund raiser for the Humane Society of the Palouse. Annually it raises about $2,500, which funds everything from food to veterinary services.