St. Piran's Day Pasty Toss is a fun, family-friendly tradition we have here in Grass Valley honoring our Cornish connection. Join us in downtown Grass Valley on the Mill Street Plaza and watch as Grass Valley's civil servants challenge Nevada City's for a friendly Pasty Tossing competition and so much more! Dogs are Welcome at the St. Piran's Day Celebration! Pasties made for tossing are prepared with pet-friendly ingredients, so bring your dog and let them join in the fun!