Post your work on their Facebook page to enter.
If your design is selected, you'll win a Family Ticket Package to the Cook Off valued at $25.
Dimensions for the large cover image are 851 x 315 pixels.
More on the Castro Valley Chili Cookoff posted on its website:
The Rotary Club of Castro Valley is pleased to bring you the 21st Annual Castro Valley Chili Cook Off. Held on Friday, May 11 from 5 to 9 p.m. at Rowell Ranch, this signature fund-raising event has grown over the years to be a great way to bring your family and our community together.
A new style of judging introduced last year will return along with the popular People’s Choice Award. Sponsorship Opportunities abound, so act fast! You can find great value in the Family Ticket Package when you buy online. This Castro Valley tradition is sure to bring a smile to your face.