Title: Book the Best GREEN Hotels in Union Square in 2025 | Expedia.ca [Union Square Travel Guide](https://expedia.ca/Denver-Union-Square.dx553248635976481523)[Vacation Rentals in Denver](https://expedia.ca/Denver-Vacation-Rentals.d178254.Travel-Guide-VacationRentals)[Flights to Denver](https://expedia.ca/Cheap-Flights-To-Denver.d178254.Travel-Guide-Flights)[Things to do in Denver](https://expedia.ca/Things-To-Do-In-Denver.d178254.Travel-Guide-Activities)[Union Square Car Rentals](https://expedia.ca/Car-Rentals-In-Union-Square.d553248635976481523.Car-Rental-Guide)[Union Square Vacations](https://expedia.ca/Union-Square.d553248635976481523.Destination-Travel-Guides) ![](https://mediaim.expedia.com/destination/2/347f29da942c18486a83e8234956103d.jpg?impolicy=fcrop&w=1200&h=500&q=medium) Photo by Nadia LaPointe # Find Green Hotels in Union Square, CO ![calendar shield illustration](https://a.travel-assets.com/travel-assets-manager/pictogram-bex/light__calendar_shield.svg) ### Change your mind Book hotels with free cancellation ![deals illustration](https://a.travel-assets.com/travel-assets-manager/pictogram-bex/light__deals.svg) ### Treat yourself Sign in to save 10% or more on thousands of hotels [Sign in](https://www.expedia.ca/login) ![bed illustration](https://a.travel-assets.com/travel-assets-manager/pictogram-bex/light__bed.svg) ### Be picky Search almost a million properties worldwide ## Check availability on Union Square Green Hotels Tonight [Sep 28 - Sep 29](https://www.expedia.ca/Hotel-Search?regionId=553248635976481523&startDate=2025-09-28&endDate=2025-09-29&adults=2&rfrr=TG.LP.CheckPrices.Hotel&openPlayBack=true) Tomorrow [Sep 29 - Sep 30](https://www.expedia.ca/Hotel-Search?regionId=553248635976481523&startDate=2025-09-29&endDate=2025-09-30&adults=2&rfrr=TG.LP.CheckPrices.Hotel&openPlayBack=true) Next weekend [Oct 3 - Oct 5](https://www.expedia.ca/Hotel-Search?regionId=553248635976481523&startDate=2025-10-03&endDate=2025-10-05&adults=2&rfrr=TG.LP.CheckPrices.Hotel&openPlayBack=true) In two weeks [Oct 10 - Oct 12](https://www.expedia.ca/Hotel-Search?regionId=553248635976481523&startDate=2025-10-10&endDate=2025-10-12&adults=2&rfrr=TG.LP.CheckPrices.Hotel&openPlayBack=true) ## Top Union Square Green Hotels ## Top Union Square Hotel Reviews ![Grand Hyatt Denver](//images.trvl-media.com/lodging/1000000/30000/24100/24031/02d72588_y.jpg) ### Grand Hyatt Denver 10/10 Excellent "Really amazing hotel! I don't have anything negative to say about my stay here." 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