In 2009 the National Park Service (NPS) completed its second Comprehensive Survey of the American Public, a nationwide telephone survey consisting of 15-minute interviews with 4,103 respondents across the United States. Both landline and cellular phone numbers were randomly sampled, and interviews were conducted in Spanish as well as in English. As one of a series of technical reports from the survey, this paper compares major racial and ethnic groups on their visitation behavior and on related attitudes and opinions about the National Park System. Race is a social classification based on perceived differences in physical characteristics, whereas ethnic status is based on a shared cultural characteristic such asnational origin. Thus "African American" and "white" are racial categories, but "Hispanic American" is an ethnic category reflecting ancestral ties to Spain. The present report is part of an ongoing effort by the NPS to understand how different population groups relate to the National Park System. Highlights of the results include: 1. Those U.S. residents who could name a unit of the National Park System they had visited in the two years before the survey were disproportionately white and non-Hispanic. 2. Hispanic respondents (of any race) and African Americans each comprised a smaller share of recent visitors than their proportion of the total sample. Asian respondents and American Indians/Alaska Natives were represented among recent visitors in roughly the same proportions as their fractions of the sample as a whole. 3. Visitation differences by race/ethnic group seem not to have changed much since the previous iteration of the NPS Comprehensive Survey in 2000. 4. Among respondents who had not visited in the past two years, the reason for not visiting more often that was most widely endorsed was that they "just don't know that much about National Park System units." Hispanic, Asian, and African Americans were more likely to agree with this statement than were non-Hispanic whites, both among recent visitors and among non-visitors. 5. Very few non-Hispanic whites saw NPS units as unsafe, unpleasant, or providing poor service, whereas up to a quarter of those in other groups agreed with these reasons for not visiting. Hispanic nonvisitors more often expressed such concerns than did members of any other group. 6. Reasons for not visiting were more widely endorsed by Hispanic respondents when the interview was conducted in Spanish than when they were interviewed in English. Such differences serve as a reminder that diversity exists within race/ethnic groups, as well as between them. 7. During their most recent visit, Hispanic Americans were less likely than non-Hispanic whites or African Americans to talk informally with a park ranger and to view indoor exhibits, while Asian Americans were the most likely to view indoor exhibits and go to a visitor center. African American visitors were the most likely to view outdoor exhibits and to participate in cultural demonstrations and ranger-led tours. The report concludes with recommendations for ways to increase awareness of NPS units among diverse groups, to translate awareness into increased visits, and to create a welcoming atmosphere throughout the National Park System. Providing accessible, relevant, and desirable experiences to underserved populations can help to sustain broad public support for national parks in an increasingly diverse America.