Eastern Sierra Avalanche Center (ESAC)Avalanche.orgAvalanche TrainingNameEmailPhoneDonner Summit Avalanche Seminarsrandall@donnersummitavalancheseminars.com(530) 412-3585Golden State Guidingryan.hartegan@goldenstateguiding.com(858) 371-3113Let’s Ride Tahoe (Motorized)letsridetahoe@gmail.com(775) 233-7417Shasta Mountain Guidesinfo@shastaguides.com(530) 926–3117Tahoe Mountain Schoolinfo@tahoemountainschool.com(530) 414-5295