This will be guests' first chance to step inside the theme park since last March's COVID-19 shutdown.
Cedar Fair says it will fill 45,000 seasonal positions across its parks for the 2021 season.
Gov. Gavin Newsom's team visited Disney World weeks before issuing guidelines that have kept California theme parks closed.
On the plus side, per capita revenue, admissions, and in-park spending increased in 2020.
The event will start March 18 and run on select dates through April 5.
The rest of the Grand Californian and Disneyland's other two on-site hotels will remain closed.
Several parks' reopening dates depend on government COVID-19 guidelines.
Six Flags Magic Mountain and Legoland California both announced new, ride-less events Thursday.