Launch from Glacier Point and land in Leidig Meadow, everybody is off by 9:30 AM and down by 10:30 AM. This happens throughout the summer, but being an early morning event (we were up at 4:30 AM) and a silent one, few park visitors are aware of it.
Draft - 2010-01-03. Minor edits still needed.
Rev 1 - 2010-01-03, 9pm