Let’s grow together! Join our community for the City Nature Challenge.

Maricopa County Parks Master Naturalists
  • Sign In

  • My Account
  • Signed in as:

  • filler@godaddy.com


  • My Account
  • Sign out

  • Home
  • Donate
  • About Us
    • About Us
    • Meet Our Chapter Board
    • AZ MN Assoc. & Chapters
    • Our Projects
    • Our Partners
    • Land Acknowledgement
  • Join Us
    • Become a MCPMN
    • Become A Friend of MCPMN
    • Become A Partner
    • Become A Speaker
  • Contact Us
  • Chapter Members Only
  • Past Newsletters
  • Gallery
  • More
    • Home
    • Donate
    • About Us
      • About Us
      • Meet Our Chapter Board
      • AZ MN Assoc. & Chapters
      • Our Projects
      • Our Partners
      • Land Acknowledgement
    • Join Us
      • Become a MCPMN
      • Become A Friend of MCPMN
      • Become A Partner
      • Become A Speaker
    • Contact Us
    • Chapter Members Only
    • Past Newsletters
    • Gallery
Maricopa County Parks Master Naturalists

Signed in as:

filler@godaddy.com

  • Home
  • Donate
  • About Us
    • About Us
    • Meet Our Chapter Board
    • AZ MN Assoc. & Chapters
    • Our Projects
    • Our Partners
    • Land Acknowledgement
  • Join Us
    • Become a MCPMN
    • Become A Friend of MCPMN
    • Become A Partner
    • Become A Speaker
  • Contact Us
  • Chapter Members Only
  • Past Newsletters
  • Gallery

Account


  • My Account
  • Sign out


  • Sign In
  • My Account
Maricopa Master Naturalists volunteer using the iNaturalist app to record data in the Sonoran Desert

Join the 2026 City Nature Challenge: Greater Phoenix Area

Calling all Phoenix nature lovers, hikers, desert plantophiles, and wildlife enthusiasts! Help the Maricopa County Master Naturalists document our urban biodiversity this April 24–27.

Subscribe to Our Newsletter for Updates

How to Get Involved: Accessible to Everyone

Anyone can join! You don't need any prior experience, special training, or a scientific background to participate. This event is about curiosity, observation, and contributing to real science.


All the life you see that you didn't plant or buy yourself counts—from the bees and butterflies in your space to the native weeds growing next to the trash can!


No experience needed  |  All ages welcome  |  Use your phone to participate

Ash-throated flycatcher on a rock

Get Started

1. Get the App

2. Join the Project

2. Join the Project

iNaturalist app icon.

Download the free iNaturalist app to your Android or iPhone and create an account.

2. Join the Project

2. Join the Project

2. Join the Project

2026 Greater Phoenix City Nature Challenge Project on iNaturalist.

Search for and join the “2026 City Nature Challenge: Greater Phoenix Area” project within the app.

3. Snap & Share

2. Join the Project

3. Snap & Share

Distant Phacelia flowering.

 (April 24-27)


Connect to your place by taking photos of wild plants and animals in your neighborhood, parks, and local ecosystems during the challenge weekend, and upload your observations to iNaturalist.

BONUS: Double your impact with SciStarter!

  1. Create a SciStarter account.
  2. Add your iNaturalist username to your SciStarter Settings under “Affiliation Integration.”

A Global Effort with Local Impact: Community Over Competition

While the City Nature Challenge (CNC) is a global event, our focus in the Greater Phoenix Area is bringing people together locally to explore, learn, and connect with nature. Instead of a competition, this is about collective impact—every single observation matters.


Whether you are hitting the trails at Camelback Mountain or South Mountain, exploring your local park, or just looking at the plants and bugs in your own backyard or alleyway, your volunteer community science documentation helps collect urban biodiversity data that supports conservation and research. Plus, aligning with the America250 celebration, documenting wildlife with the iNaturalist app counts toward the global Citizen Science Month goal of generating "One Million Acts of Science"!


Our goal this year is to work as a team to double our participation and observations from last year. We are focusing on quality over quantity, and we challenge each participant to make 125 quality observations over the weekend so we can hit this milestone as a community!

Need some practice before the big weekend?

We are hosting free practice hikes across the valley to help you sharpen your observation skills and learn how to use the app!


View the Practice Hike Calendar


Can’t make it in-person? Practice with us online on April 21st at 6pm.


City Nature Challenge: Online Participant Training - RSVP

A saguaro cactus

Why We Are Co-Organizing the Challenge

The Maricopa County Master Naturalists are thrilled to be a co-organizer of the Greater Phoenix Area CNC for its 6th year, alongside incredible partners like EcoExplorers, Mary Lou Fulton College for Teaching and Learning Innovation at ASU, SciStarter, Maricopa County Parks and Recreation, Desert Botanical Garden, Arizona Science Center, Arizona Game and Fish and more!


As a local chapter of the statewide Arizona Master Naturalist Association, our volunteers are dedicated to supporting our local environment. All of our chapter's activities, reporting, and mission-driven work are categorized under three core pillars:


  • Stewardship: On-the-ground restoration and conservation efforts, including the Desert Defenders invasive plant pulls, seed harvesting and planting events, and wildfire mitigation.
  • Education: Public outreach and interpretive programs, such as hosting workshops and completing docent shifts.
  • Community Science: Vital data collection and biological monitoring, frequently contributing to projects via iNaturalist.


 We believe that anyone can be a community scientist. By participating in this event, you are taking the first step in helping us protect the beautiful desert we call home.

Do You Love Being a Community Scientist?

Group of Master Naturalists smiling.

The City Nature Challenge is just the beginning!

If you love learning about native plants and animals, we invite you to stay connected.


Subscribe to the Maricopa County Master Naturalists newsletter to learn about upcoming volunteer opportunities, get seasonal articles, and be the first to know when we open applications for our next Master Naturalist training cohort!

Connect with us Online

Follow our journey on social media to see our impact year-round!


Copyright © 2026 Maricopa County  Master Naturalists - All Rights Reserved.

  • Donate

Powered by

This website uses cookies.

We use cookies to analyze website traffic and optimize your website experience. By accepting our use of cookies, your data will be aggregated with all other user data.

Accept

Subscribe to our Newsletter

Sign up to get notified about upcoming volunteer events, new blog posts and other exciting things! 

Subscribe