The University of Arizona: ENR2 Guided Tour
How can we have a lush but water-wise garden in the middle of a densely populated city? Join us at the Environment and Natural Resources 2 Building (ENR2), a LEED...
Free
6 events found.
Conservation and Sustainability
Events for April 18, 2026
Ongoing
The University of Arizona: ENR2 Guided Tour
How can we have a lush but water-wise garden in the middle of a densely populated city? Join us at the Environment and Natural Resources 2 Building (ENR2), a LEED...
Free
Children’s Museum of Phoenix: Thing-a-ma-jigs
Using recyclables plus a dash of imagination, construct a one-of-a-kind masterpiece.
Free with Admission
Greater Phoenix City Nature Challenge 2026: Nature Observations 101 – Using iNaturalist for the Greater Phoenix City Nature Challenge
Do you like observing nature? Then help science and make your observations count! The City Nature Challenge is a friendly worldwide competition among cities to see whose residents can spot...
Free with Admission
Arizona State Parks & Trails: Earth Day Celebration at Red Rock
Join us on Saturday, April 18th from 10 a.m. to 2 p.m. for our annual Earth Day Celebration in Sedona's red rocks! FREE admission from 9:30 a.m. to 1:30 p.m.!...
Free
Arizona State Parks & Trails: Star Party at Kartchner Caverns
oin Kartchner Caverns, an International Dark Sky Park, for a Star Party on April 18 to celebrate International Dark Sky Week! Before night sky viewing through high-powered telescopes begins, listen to...
Free with Park Fee