Greater Phoenix City Nature Challenge 2026: Second Sundays on Mill – Urban Adventure

Join us the 2nd Sunday in April from 10 AM to 3 PM for a market experience that’s anything but average! Each event features a new theme with on-street entertainment, interactive art, themed activities, snacks, and drinks — plus plenty of fun for all ages. This month: Citizen Science! The outdoor market lines Mill Avenue between 3rd St. and University and features a curated mix of Arizona-based artists, makers, and small businesses — including a special Kids Market where young entrepreneurs showcase and sell their own handmade creations. The event is FREE admission, family-friendly, and dog friendly!     Part of Greater Phoenix City Nature Challenge 2026