Sonora Pass, Ca OPENS Friday! | Tioga Pass OPEN to Summit Today! One good thing about low snowfall in California is that both the Sonora and Tioga passes in California will be opening very early. Sonora pass opens Friday and Tioga pass will open to the pass at 9,943-feet from the East today. Both of these passes give access to some of the most incredible backcountry skiing in the USA. SONORA AND TIOGA PASS OPENING DATES: 9,624-foot Sonora Pass will open on Friday, April 17th, 2015. 9,943-foot Tioga […] Industry News SnowBrains | April 15, 2015 0 Comments