Contribute a photo Oso Flaco Lake San Luis Obispo County, CA Follow Share Share Oso Flaco Lake... Email Facebook Twitter Oso Flaco LakeFollow Overview Fishing Reports Guides & Tackle California Oso Flaco Lake Nearby Businesses Guides & Tackle Shops near Oso Flaco Lake Checkout local fishing businesses near Oso Flaco Lake. Add your business. Currently, no businesses are listed for Oso Flaco Lake. Be the first to add yours! Feature your Oso Flaco Lake Business here! Learn more