Yosemite National Park says the historic Ahwahnee Hotel will stay closed until Friday at 4 p.m. while geologists puzzle over whether any more rocks are likely to crash down from the Royal Arches formation in Yosemite Valley. As the rangers note, however, "these types of events are unpredictable." The biggest rock to come down in yesterday's fall was estimated at 350 cubic meters. Damage was limited to a few cars.