From Memorial Day to Labor Day, visitors will need reservations to get into Yosemite National Park on most days.

When you think of Yosemite’s most dangerous wildlife, grizzlies or mountain lions might come to mind—but according to the National Park Service, it’s the humble-looking mule deer that tops the list for visitor injuries.

After months of delays and confusion, the Trump administration has finally announced that visitors will be required to have reservations to enter Yosemite National Park this summer, although on fewer days than last year.