When you’re looking for a family-friendly resort in California, first decide on your must-see list. Nature rules at the more than 250 state parks and icons like Yosemite National Park.

But if you're craving a relaxing escape, the atmosphere at Hacienda Tres Ríos Resort will suit you well. Surrounded by 326 acres of parkland (150 acres of which is a nature preserve) just about 8 ...