I'm after some quick advice. I'm planning a passing-through visit to Yosemite on the 24th July with a group of fit people who are after a challenging walk. The Half Dome hike looks perfect, but I'm unclear whether we can just turn up and walk it, or whether we need a permit. Can anyone clarify this? Getting a permit will be impossible for us, as we are on a tight schedule and won't be ableby srweal - General Discussion