Platform all generate their own style and feel. Here are some wood platform for your California King.

eLuxurySupply Wood Bed Frame

Cardinal & Crest | Wood California King Bed Frame

HOMES: Inside + Out 2-inch Bunkie Board/Foundation

Montana Woodworks Homestead Collection California King Platform Bed with Storage

New Classic Furniture Bastion Bed, California King

Montana Woodworks Glacier Country Collection Platform Bed, California King

Furniture of America Ardel Diamond Carved Platform Bed, California King