Cash prizes for artists of all ages!! Support autism in a positive way. The Autismhwy.com 5th Annual Autism Chalk Festival The biggest Autism Acceptance April event on the West Coast! Let’s change the dialogue about autism. Mark your calendar! Saturday, April 18, 2015 Heritage Park Downtown Covina, Cal. (33 miles east of Los Angeles) Citrus Avenue from the 10 or 210 freeways.