A group of LGBTQ climbers and advocates hung a large transgender pride flag in the middle of Yosemite’s famous El Capitan rock formation on Tuesday.

The activists, who describe themselves as “a coalition of transgender, queer, and ally climbers,” unfurled a 55-by-35-foot transgender pride flag on the famous rockface at 10 a.m. Tuesday, according to a statement shared by the group. The action, called “Trans is Natural,” unfolded as scores of spectators watched from the valley below.