One of Waterbury's great grassroots groups, Spirit of Waterbury, put together a winter festival at Hamilton Park this afternoon, the second in their series of Hidden Spaces, Secret Places events. The weather was more mud season than snow season, but everyone still had a good time. An estimated 1,000 people attended the event, which included a small bonfire, several pit fires, s'mores, chili, soups, hot chocolate, food trucks, and a mobile pub.