From downtown Salt Lake City:

Take I-15 south to I-215 east and exit at 6200 South Street taking a right turn at the light.
Follow this road up the hill to Wasatch Boulevard and on toward Little Cottonwood Canyon
Following the signs to Snowbird and Alta.

From the airport:

Take Interstate 80 east to Interstate 215 south.
I-215 swings east toward the Wasatch Mountains, exit at 6200 South Street taking a right turn at the light.
Follow this road up the hill to Wasatch Boulevard and on toward Little Cottonwood Canyon
Following the signs to Snowbird and Alta.