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Arizona State Parks & Trails: Apple Packing Shed Open House

Slide Rock State Park 6871 AZ-89A, Sedona

Experience a piece of Arizona history. Get an opportunity to explore the Pendley Homestead Apple Packing Shed. A ranger will be available to answer any questions about the homestead's history....

Free with Park Fee

Arizona State University: Earth Day Stadium Walk 2026

Mountain America Stadium 500 E. Veterans Way, Tempe

Join University Sustainability Practices and SRP for the free ASU Earth Day Walk at Mountain America Stadium. This unique celebration of sustainability includes a three lap walk around the stadium...

Free

Children’s Museum of Phoenix: Earth Day Expo

Children's Museum of Phoenix 215 N. 7th St., Phoenix

Join us in the Children’s Garden for fun and educational outdoor activities in celebration of Earth Day! Wednesday, April 22nd from 9am-1pm. HANDS-ON PROGRAMS INCLUDE: Compost Corner – Explore the world of worms and roly-polies and build your own compost container to learn about how composting works Seed Bombs – Make a wildflower seed bomb to take...

Free with Admission

Reid Park Zoo: Sean Kenney’s Nature Pop!

Reid Park Zoo 3400 Zoo Court, Tucson

Part art. Part engineering. Totally amazing! Add a pop of wonder and a pinch of nostalgia to your spring with Sean Kenney’s Nature Pop! Marvel at over 40 wildly creative...

Free with Admission

Tucson Botanical Gardens: Garden Story Time

Tucson Botanical Gardens 2150 N. Alvernon Way, Tucson

Join us every Wednesday at 10 am in the Education Classroom for an interactive story session. This fun hour features nature-themed stories, songs, puppets, and sensory activities! Held rain or shine. Kids of all ages welcome, but we are geared toward infants through 7-year-olds. Registration is not necessary. Free with Garden Admission.

Free with Admission

Mesa Public Library: Grow-a-Garden!

Mesa Public Library - Gateway Branch 5036 S. Eastmark Pkwy., Mesa

Join us as we celebrate Earth Day with some planting. We will have biodegradable starter cups, soil, and seeds. We just need you to plant them and watch them grow!

Free

Mesa Public Library: Citizen Science – Earth Day Animal Spot-a-thon

Mesa Public Library - Red Mountain Branch 635 N. Power Rd., Mesa

Help scientists identify as many animals as possible in camera trap images. This event is a part of "Acts of Science: Connected," which will bring us all together in April to celebrate participation in real research for Citizen Science Month! SciStarter is aiming toward a shared goal of 2.5 million acts of science by the...

Free

Mesa Public Library: Earth Day Animal Spot-A-Thon

Mesa Public Library - Gateway Branch 5036 S. Eastmark Pkwy., Mesa

Celebrate Earth Day by helping scientists monitor wildlife! In this hands-on event, you’ll explore trail camera photos and help classify the animals you see. Your contributions support a NASA-supported research project that tracks changes in wildlife distributions and abundances over time—critical data that informs wildlife management and conservation decisions. This Citizen Science event is a...

Free

Flandrau Science Center & Planetarium: Touring the Solar System

Flandrau Science Center & Planetarium 1601 E. University Blvd., Tucson

Take a guided journey through the Solar System and explore what makes each planet unique—from Jupiter’s giant storms to Saturn’s rings. We’ll also visit moons, asteroids, and the Milky Way...

Free – $27

Maricopa County Library District: Earth Day Celebration!

MCLDAZ - Guadalupe Library 9241 S. Avenida Del Yaqui, Guadalupe

Come and celebrate Earth Day with us. We will learn some gardening techniques. Plant a sunflower seed in a pot for you to take home. All materials provided

Free