The Sierra Nevada is popular for outdoor activities year round. However, each season has its special challenges; be sure you're prepared.

Seasons aren't always clear-cut in the mountains. It can be summer-like in the valleys, while in higher elevations it can still be winter.

Hiking and backpacking are popular in late spring, summer and early fall. Cross country skiing, snowboarding and snowshoeing are popular when snow is on the ground. Elevation defines the seasons in mountain areas more than the calendar.