If you are not getting out into the mountain meadows to see butterflies, you might enjoy visiting the Molbak Butterfly Garden at the Woodland Park Zoo in Seattle. It is free after you pay the zoo admission fee.
The garden is home to up to 500 free-flying butterflies representing at least 15 species native to North America. You can also look into the Silverspot Butterfly Lab where the endangered Oregon Silverspot butterflies are raised to be released into a protected wild habitat. For more information: https://www.zoo.org/butterflygarden