Check the Camp 4 kiosk or the Mountain Shop for the current Peregrine Falcon closures. On first ascents: Please think about the impacts that will be caused by your new climb- Is the approach susceptible to erosion? Is there a lot of vegetation on the rock? 'Gardening' (i.e., killing plants), is illegal in Yosemite. Can the climb be done with a minimum of bolts? Motorized drills are prohibited.