MondayãApril 19ã4:48 pm Marin 'on Cusp' of Becoming First Bay Area County in State's Least Restrictive Reopening Tier Marin County may be headed into California's yellow, least restrictive reopening tier as early as Tuesday, when state health officials announce weekly changes. The county would join just three others in the state â Lassen, Alpine and Sierra â currently in the yellow tier, allowing most indoor businesses to reopen. That includes indoor bars that don't serve food, which could reopen at 25% capacity. It would also allow for larger indoor and outdoor gatherings. The county is "right on the cusp" of the state's threshold to advance into the "minimal" tier, said county spokesperson Laine Hendricks on Monday.