Half Dome Availability & Cancellation Tracker
Half Dome is issued via lottery. Our scanner is actively monitoring it and has sent 59 availability alerts to watchers in the last 30 days.
PermitCast forecast
Odds of an opening for Half Dome
The odds that our scanner catches at least one availability opening for this permit in the window ahead — based on how often it actually has, not a guess.
Next 7 days
Moderate chance
Next 14 days
Moderate chance
Based on 8 weeks of our scan history. Forecast last updated Aug 18, 2026.
Scans in the last 30 days
27,172
Automated availability checks
Availability changes detected
68
Since July 20, 2026
Alerts sent to watchers
59
Last 30 days
Last availability change
Aug 19, 3:30 AM PDT
A change means the set of open dates for Half Dome actually shifted between two scans: a date opened, closed, or quota moved. Counts update continuously.
Recent availability changes
No availability changes detected yet for this permit. Once someone starts watching it, the scanner begins checking continuously and any opening will show up here.
See the live feed of availability changes across all permits.
How cancellation tracking works
Sold out almost never means gone. People cancel Half Dome trips for weather, injuries, and schedule changes, and those dates go straight back to the booking system without any announcement.
PermitSnag checks Half Dome availability around the clock, compares every scan against the last known state, and alerts watchers only when the open dates actually change. No refresh-tab-and-pray, no false alarms from unchanged listings.
Half Dome availability questions
How do I get a Half Dome permit after it sells out?
Cancellations. Booked Half Dome permits that get cancelled return to the reservation system, usually with no announcement. PermitSnag scans continuously and alerts you the moment a date you want opens up.
How often do Half Dome permits become available?
In the recent tracking window our scanner detected 68 availability changes for Half Dome and sent 59 alerts to watchers in the last 30 days. Cancellations cluster around fee deadlines and weather changes.
How fast are Half Dome availability alerts?
Paid plans are scanned about every minute and alerts go out within seconds of a detected opening, by push notification, SMS, and email. Free accounts are scanned hourly.
Can I still get a Half Dome permit if I lost the lottery?
Usually yes. Winners cancel or skip payment deadlines, and those dates return to the booking system. Tracking Half Dome for cancellations is the standard fallback after a lottery loss.