Heavenly and Northstar are among the first major Sierra ski resorts to open with COVID-19 capacity limits. Sierra ski resorts are planning to control the number of skiers on the slopes by limiting the number of available tickets. Advanced reservations are also encouraged. Heavenly tweeted they will be able to accommodate more guests as they begin to open more terrain. Squaw Valley and Alpine Meadows are opening on Wednesday with health and safety measures in place.