Yellowstone National Park logged its first million-visitor month in July, a milestone symbolic of the heavy tourist traffic across the country’s national parks, as visitors travel to wide-open spaces in response to—and in spite of—the surging delta variant of COVID-19.

The National Park Service has yet to release final numbers, but Superintendent Cam Sholly told reporters last week that the park hosted approximately 1,080,000 recreational visitors in July, Yellowstone’s busiest month ever. Neighboring Grand Teton National Park also saw a record month in July, hosting an estimated 828,777 recreational visitors.