The Glacier Point Road, which provides the only access by car to these hikes, usually opens around late May or early June, depending on conditions. Once the road opens, trails can remain wet and/or snowy for a few to several weeks. The Glacier Point Road usually closes sometime in November.
Shuttle service is not available between Yosemite Valley and Glacier Point. Limited bus service (via the Glacier Point Tour) is available; reservations are required. Do not hike to or from Glacier Point expecting to take a bus back to your car unless you have a reservation.