About 150 people gathered on Saturday at Point Reyes National Seashore headquarters, joining thousands of others at parks across the country to protest the Trump administration’s firing last month of at least 1,000 National Park Service employees. 

The Resistance Rangers, a group of some 700 off-duty and former park service staffers, planned rallies at each of the country’s 433 park units on Saturday. By the afternoon, protests had taken place at 170 sites, from…