The 2025 Rocky Mountain Koi Show and Aquatic Expo will be held on Friday to Sunday, August 29 to 31, 2025, at the Douglas County Fairgrounds in the Large Animal Barn. This is a FREE family friendly event. Approximately 30, 500-gallon classic blue tanks will be filled with some of the most beautiful and highest quality koi competing for awards.
The event is open to the public on Friday from 1 p.m. to 5 p.m., Saturday from 9 a.m. to 5 p.m. and Sunday from 9 a.m. to 1 p.m.
Some of the fish are worth many tens of thousands of dollars, so if you’ve never been to a koi show this is a unique opportunity. Meet volunteers who are happy to tell you about the koi.
Get ready to see & shop for koi, corals, saltwater fish, freshwater fish, equipment, fish food and so much more! See and handle real Koi teeth, vote for your favorite fish and get photos with the club mascot.
There will be silent auctions, raffles, education, entertainment, seminars, and so much more!
Besides the fish, there will be aquatic items, such as art, food, books, chemicals, pumps, filters, etc. for your pond and aquariums.
500 Fairgrounds Dr., Castle Rock.
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