The International Rose Test Garden is located in Portland, Oregon and is one of the oldest rose test gardens in the United States. Established in 1917, it serves as a testing ground for new rose varieties, showcasing over 10,000 rose plants from more than 650 different species. The garden is renowned for its beautiful displays and is a popular destination for visitors. The garden is divided into several sections, including the Old Rose Garden, the Modern Rose Garden, and the Miniature Rose Garden. It is open to the public year-round and offers stunning views of the Portland skyline and Mount Hood. The garden also hosts various events and educational programs related to rose cultivation.