Take exit 311, go west through West Laramie through 2 traffic lights, watch for Snowy Range Laundry on the right and then veer to the right on Wyo 130. Look for a brown sign with an arrow for Snowy Range Ski Area or green highway sign that says Centennial with an arrow.
From WYO 230:
Once you enter West Laramie, look for the Shell Station on the left side of the road, take your first left at Wyo 130. Stay on Wyo 130 towards Centennial. Once you leave Centennial, Snowy Range will be 5 miles up the road on the Left.