– The Rhone Rangers will host an International Grenache Day Celebration on Friday, Sept. 16, in Paso Robles. The evening event is planned to coincide with the annual day of celebration, recognizing Grenache - one of the most widely planted grape varieties in the world. Members from throughout the national organization will be represented, including wineries from Paso Robles, Santa Barbara County, Monterey County, Sonoma, and Oregon.