n the soft light of dawn, an Ohio tourist studied the interpretive sign at the summit of Cadillac Mountain in Acadia National Park, reading about how magma formed the ground under her feet.

There is one sign she and the other 4 million-plus tourists who visit Acadia annually can no longer see at the summit: a marker explaining the mountain’s sacred significance to the Wabanaki people in the region. “Today, visitors from everywhere find meaning on the mountain,” it said.

It was among 30 markers removed from Acadia under a Trump administration campaign to strip national parks of materials deemed disparaging to American history, according to the National Parks Conservation Association.

But when park staff took down the summit sign at the orders of Interior Secretary Doug Burgum , they also unraveled some of the trust that took decades to build between Acadia National Park and the Wabanaki people.…