Mustard fields frame Cerro San Luis Obispo | San Luis Obispo Tribune

Bright, colorful mustard fields frame Cerro San Luis Obispo on May 6. Volcanic activity formed the mountain more than 20 million years ago. — Bright, colorful mustard fields frame Cerro San Luis Obispo on May 6. Volcanic activity formed the mountain more than 20 million years ago. Laura Dickinson ldickinson@thetribunenews.com

Bright, colorful mustard fields frame Cerro San Luis Obispo on May 6. Volcanic activity formed the mountain more than 20 million years ago.

This story was originally published May 17, 2016 at 4:14 AM with the headline "Mustard fields frame Cerro San Luis Obispo."