The term US Open is applied to open (as in anybody, even foreigners can compete) US-American championships in a particular sport. The most prominent ones are:
... is 89.17% White, 4.63% African American, 0.42% Native American, 1.16% Asian, 0.05% Pacific Islander, 2.84% from other races, and 1.74% from two or more races. 7.68% of ...