Chicory

 
These were blooming up and down the road to Eldorado Canyon State Park. They were absolutely stunning in the rain. When everything else was gloomy browns and greys, these blue flowers really stood out.

I'm not sure about my identification because some features were obscured by rain, but I thought it was Common Chicory, aka Blue Sailors aka Cichorium intybus. My doubt comes from the fact that my bloom seems to have about nine petals and the identification guide photograph has about thirteen.