Northwest Wildflowers

Wildflower Destinations > Willamette Valley & Puget Sound

Cooper Mountain Nature Park

Washington County, Oregon

Tualatin Hills Parks & Recreation

Fees: none

Activity: walking

Elevation: 428'-766'

Current status (as of 7/14/24): not blooming

Peak wildflower bloom at Cooper Mountain Nature Park is typically from early April through May into early June, but there may be some flowers blooming from late March until late June.* (In 2024, things are running a little later than usual.)

Typical year:

Featured plants: Delphinium leucophaeum

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* The dates given on this Web site for each location's blooming season are only estimates and can vary from year to year. Weather conditions in the winter and spring can shift these dates by up to a month, especially in the mountains. For the latest updates, check the Oregon Wildflowers or PortlandHikers Facebook groups, or browse the most recent postings to iNaturalist or Instagram.