A wildfire that was burning more than 19,000 acres on Saturday forced the National Park Service to close an access point to the Grand Canyon National Park during the busy summer tourist season, officials said.

The fire, known as the White Sage fire, started on Wednesday evening with a lightning strike near Fredonia, Ariz., according to the Bureau of Land Management. As of Saturday, the fire had burned 19,153 acres and was zero percent contained.

The fire was not burning within Grand Canyon National Park, the park said.

The access point to the park, the North Rim, was closed starting on Thursday, and all visitors had to evacuate, according to a National Park Service news release.

The access site remained closed to visitors until further notice, the park said on Saturday on Facebook. The North Kaibab Trail was temporarily closed north of Manzanita Rest Area.