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Ongoing

Maricopa County Parks and Recreation: McDowell – Invasive Species Removal

McDowell Mountain Regional Park 16300 McDowell Mountain Park Dr. MMRP, Fountain Hills

Desert Defender volunteers needed! Join us in removing invasive species and reducing the wildfire risk in Maricopa County Regional Parks. Participants will learn to identify several invasive species, their phenology...

Free with Park Fee

Maricopa County Parks and Recreation: City Nature Challenge Hike

San Tan Mountain Regional Park 6533 W. Phillips Rd., Queen Creek

Help document biodiversity of a scenic, under-visited part of the park while participating in the City Nature Challenge with Ranger Eric! The option to do a short vs. a longer...

Free with Park Fee

Maricopa County Parks and Recreation: City Nature Challenge Hike

Usery Mountain Regional Park 3939 N. Usery Pass Rd., Mesa

Join Ranger Jacque on a brief hike and use your phone to document biodiversity in the park for the City Nature Challenge global Citizen Science competition. Citizen Science Month 2026...

Free with Park Fee

Maricopa County Parks and Recreation: City Nature Challenge Hike

Spur Cross Ranch Conservation Area 44000 N. Spur Cross Rd., Cave Creek

Join Ranger Nikki on a moderate hike and use your phone to document biodiversity in the park for the City Nature Challenge global Citizen Science competition that runs April 24-27. ...

Free with Park Fee

Maricopa County Parks and Recreation: Lake Pleasant – Earth Day Clean-Up

Lake Pleasant Regional Park 41835 N. Castle Hot Springs Rd., Morristown

Date - Saturday, April 25, 2026, EARTH DAY LITTER PICK UP EVENT Time – 8:00 am -11:00 am Location – Lake Pleasant Regional Park, Main Entry.  Directions:  From central Phoenix,...

Free with Park Fee

Phoenix Zoo: Earth Day

Phoenix Zoo 455 N. Galvin Pkwy., Phoenix

We have the power to save our planet! Join us for games and activities and learn about conservation and renewable energy!

Free with Admission

Phoenix Public Library: Let’s Build a City for Earth Month!

Phoenix Public Library - Saguaro Library 2808 N. 46th St., Phoenix

Using upcycled items like cardboard, bubble wrap, wrapping paper and more, we will create a colorful, unique cityscape. Working individually and together we will craft buildings and bridges using just...

Free

Maricopa County Parks and Recreation: City Nature Challenge Hike

Hassayampa River Preserve 49614 U.S. Hwy. 60 89, Wickenburg

Join Ranger Kevin to learn about and document biodiversity in the park for the City Nature Challenge global Citizen Science competition that runs April 24-27th .   The City Nature Challenge...

Free with Park Fee

Greater Phoenix City Nature Challenge 2026: Sustainability Fest

Arizona Science Center 600 E. Washington St., Phoenix

Discover how to live life more sustainably at Arizona Science Center’s Sustainability Fest Explore topics like rising seas, how to reduce your carbon footprint, composting and recycling, seed germination, and...

Free with Admission

Tempe Public Library: Climate Future Film Festival

Tempe Public Library 3500 S. Rural Rd., Tempe

This “mini-festival” features ten award-winning short films from four continents that invite inspiration, conversation, and hope around climate change.   Hope and panic, greed and courage, fear and comedy: ten...

Free

Mesa Public Library: Saturday at the Ranch – Recycled Creations

Mesa Public Library - Dobson Ranch Branch 2425 S. Dobson Rd., Mesa

Families who craft together stay together. We’ll provide supplies, tools, and ideas to get you started, but the final creation is up to you. Engaging in creative activities like crafting...

Free

Verde Valley Birding and Nature Festival: Hummingbird Conservation

Cottonwood Recreation Center 150 S. 6th St., Cottonwood

Alice Madar, Executive Director of the International Hummingbird Society, will share her perspective on what makes hummingbirds so special, why targeted conservation for them is critical, what conservation projects are...

$15