Mirror Lake lies at the foot of the semi-dome, which is often the base for climbing the vertical walls of the semi-dome. At this time, I have been wondering whether the plan to climb the semi-dome will succeed the day after tomorrow. Since the number of people who have been limited since the half-dome peaked last year, it has become a bit unpredictable to complete the plan at the right opportunity. First, you must apply online, and only 2 days in advance, there should be not many people applying this season, which means that as long as you can successfully apply, you may go to the opposite mountaintop.