Apr 17 Maricopa County Parks and Recreation: City Nature Challenge Practice Hike 11:30 am - 1:00 pm Estrella Mountain Regional Park 14805 W. Vineyard Ave., Goodyear Event Details Get Directions
Apr 18 Greater Phoenix City Nature Challenge 2026: Nature Observations 101 – Using iNaturalist for the Greater Phoenix City Nature Challenge 10:00 am - 11:30 am Arizona Science Center 600 E. Washington St., Phoenix Event Details Get Directions
Apr 18 Arizona State Parks & Trails: Earth Day Celebration at Red Rock 10:00 am - 2:00 pm Red Rock State Park 4050 Red Rock Loop Rd., Sedona Event Details Get Directions
Apr 20 ⭐Arizona Game and Fish Department: Citizen Science Case Study – Land Snails in Arizona 7:00 pm - 7:45 pm Online Event Details Get Directions
Apr 22 Greater Phoenix City Nature Challenge 2026: Acts of Science – Connected − Earth Day Animal Spot-A-Thon 8:00 am - 10:00 am Online Event Details Get Directions
Apr 22 Maricopa County Parks and Recreation: Discovery Station – What is the City Nature Challenge? 9:00 am - 12:00 pm Lake Pleasant Regional Park 41835 N. Castle Hot Springs Rd., Morristown Event Details Get Directions
