During extremely busy periods—such as July 4—you will experience delays at the entrance gates. For smaller crowds, visit midweek. Or come mid-April through Memorial Day or mid-September through October, when the park is a bit less busy and the days usually are sunny and clear.
Summer rainfall is rare. In winter, heavy snows occasionally cause road closures, and tire chains or four-wheel drive may be required on the roads that remain open. The road to Glacier Point beyond the turnoff for Badger Pass is closed after the first major snowfall; Tioga Road is closed from late October through May or mid-June. Mariposa Grove Road is typically closed for a shorter period in winter.