After the National Park Service (NPS) proposed banning rock climbing and other activities in parts of Great Falls Park this September on the grounds that rare and endangered plants had been discovered there, climbers requested the names and locations of the plants under the Freedom of Information Act in order to develop ways to avoid them. “We’ve denied their request,” says NPS spokesperson Bill Line, who argues that if his agency releases the identity and the location of the plants, thieves might come to the park, pick them, and sell them on the black market. Some climbers remain unsatisfied, saying they want to work with the NPS on a solution but can’t as long as they are kept in the dark. “It’s ‘Hey, we say [the plants] exist, and you can’t conduct an activity that people have been doing in Great Falls since the 1940s,’” says John Smith, a climber from McLean. “I think we’re getting a little overboard on our secrecy here. These aren’t nuclear secrets we’re talking about.” —Ryan Grim