Wilderness permit options Step 6
For a day hike permit on the Main Mt. Whitney Trail, show up at the Visitors Center by 11 am the day BEFORE your entry date. Any cancellations that have not been re-reserved will become available then. If unsuccessful, report back to the Visitors Center by 2 pm that afternoon. No-shows for the next day become available at 2 pm.
If people do not pick up or confirm their
day hike permits by noon the day BEFORE their hike, the space is reissued at
2 PM. I don't know why you would want to leave super early in the morning, unless you are trying to get any no-show space that was left over from the previous afternoon (and was not reissued by closing). Aren't you planning to acclimate at someplace like the Portal/Horseshoe Meadow before you begin your hike?