City Nature Challenge

Help the Seattle-Tacoma Metropolitan Area (including Everett, Seattle, Bellevue, Tacoma and any place within Snohomish, King and Pierce counties!) show the world how biodiverse our region is by making observations of local species during City Nature Challenge!

About the program


Welcoming All Community to the City Nature Challenge

A Virtual Conversation About Accessibility

On April 8, 2024 from 10:00 PM UTC - 11:30 PM UTC | 3:00 PM PST - 4:30 PM PST | 6:00 PM - 7:30 PM EST.
In English - Closed Captioning Enabled.


With tens of thousands of participants from all over the world, accessibility in the City Nature Challenge is so important and it can be overwhelming! Join CNC planning team member Sam Tayag, co-founder Lila Higgins, and longtime Washington DC Metro Area organizer Ana Ka'ahanui for a conversation with fellow organizers and city partners to explore accessibility in the City Nature Challenge. What can we do now, and what can we work toward to make the City Nature Challenge truly the largest bioblitz on the planet?

This conversation isn’t complete without the people on the ground, bringing the City Nature Challenge to your community. Please feel free to share this and invite any community partners, naturalists, outdoor educators, teachers or other individuals you collaborate with in your city. 



Woodland Wander: A City Nature Challenge Adventure with Woodland Park Zoo

Free to attend. Ages 12 - 18. Registration required.

Saturday, April 20, 2024, 10:00 - 1:00 PM | Cougar Mountain Regional Wildland Park

Explore the beauty of Cougar Mountain Regional Wildland Park with YMCA Earth Service Corps (YESC) and Woodland Park Zoo! Join us for a nature walk where you'll learn to use iNaturalist to identify species and participate in the 2024 City Nature Challenge. Connect with nature and contribute to biodiversity conservation efforts. Transportation assistance available from YESC.



Orientation for Individuals & Families

Tuesday, April 23, 2024, 6:30 - 7:30 p.m. PST

Curious about citizen science and ways to support your community? Then join us for an informative virtual session to learn how you can help observe and identify local ecology right in your area!

Who is This For?

Anyone in King, Pierce or Snohomish Counties that is interested in learning more about the 2023 City Nature Challenge.

What We'll Cover

We’ll cover the basics of this popular worldwide event and its history. We’ll learn how to use the iNaturalist app and share tips for making and documenting observations of the many wild birds, bugs and plants that call our area home.  We will also have plenty of time to answer questions and chat with our neighbors!


Advance registration is required. After registering, you will receive a confirmation email containing information about joining the meeting.



Lake Tradition Plateau BioBlitz Hike

Free to attend. Registration required. No pets allowed.

Friday, April 26,2024, 1:00 - 3:30 p.m. | East Sunset Way Trailhead

Join City of Issaquah Urban Forest Supervisor Dan Hintz on an excursion onto the Lake Tradition Plateau to learn about and identify as many unique species of plants and animals as possible!



Nature of your Neighborhood Bioblitz

Free to attend. Registration required.

Saturday, April 27, 2024,8:00 - 12:00 p.m. | 11th Ave E Biodiversity Corridor, Seattle University gathering location: Sinegal Center (SINE) Room 100

Join Birds Connect Seattle and Seattle University in participating in the City Nature Challenge! We will gather on the Seattle University campus and work together to make observations throughout the 11th Ave E Biodiversity Corridor, focusing on invertebrates. During the event, participants can stop by our Seattle University gathering location, Sinegal Center (SINE) Room 100, to get support using iNaturalist, get some ideas about how to get started making observations, access field guides and other identification resources, see what observations are being made and connect with other participants. This event is primarily geared towards people living in and around the 11th Ave E Biodiversity Corridor, though all are welcome to attend. Bring your own smartphone or tablet and an interest in finding urban biodiversity.



Meet-up at Seward Park for City Nature Challenge

Free to attend. Registration encouraged.

Saturday, April 27, 2024, 10:00 a.m.

Join Woodland Park Zoo's Community Collaborative for a nature walk through Seward Park! We will meet at the lop in front of Seward Park Audubon Center (5902 Lake Washington Blvd S, Seattle, WA 98118) and explore different areas of the park. The walk will last roughly 1-1.5 hours and could be up to 2 miles with elevation gain and/or stairs. Rest breaks will be provided throughout the walk. Along the walk, zoo naturalists will lead fun, family-friendly activities. We will provide snacks and water, and encourage participants to bring reusable water bottles. All ages are welcome, with youth under 14 years of age expected to have adult supervision at all times. We will email you final details 3 days before the event. For questions, please email



Guided Tree Walk & Bio Blitz

Free to attend. Registration required.

Saturday, April 27, 2024, 10:00 - 11:30 a.m. | Duwamish Hill Preserve, 3800 S 115th St, Tukwila, WA 98168

Join us for an educational tree walk to celebrate Earth Month! Maya Klem will lead the walk and talk about different types of native trees, how they support wildlife and why it is important to have a diverse palette of trees in a green space.



City Nature Challenge at North Beach Park

Free to attend. Registration encouraged.

Saturday, April 27, 2024, 12:00 - 2:00 p.m. | North Beach Park, 8999 24th Ave. NW, Seattle, WA 98117

All are welcome for a City Nature Challenge at North Beach Park! Forest steward, Tad Anderson, will tell us the park’s ongoing story of restoration and introduce us to a few of the key native and non-native plants who live there. Participants will then explore the park and submit observations to iNaturalist of all the neat nature you find who call North Beach Park home. No plant or animal identification skills or iNaturalist experience needed, just bring something for taking photos (if you can) and your love of nature!



City Nature Challenge Beach Walk

Free to attend. Registration required.

Saturday, April 27, 2024, 1:30 - 3:30 p.m. | Constellation Park

This walk is geared towards folks 50+ and their families.

Come explore the wonders of low tide at Constellation Park in West Seattle with Seattle Urban Nature Guides! We will take a look at many different intertidal species and hopefully increase Seattle’s biodiversity count for the City Nature Challenge!



City Nature Challenge Sunset Beach

Free to attend. Registration Required.

Saturday, April 27, 2024, 2:00 - 4:00 p.m. | Sunset Beach, Lake Sammamish State Park

Join City of Issaquah Urban Forest Supervisor Dan Hintz on a walk along Sunset Beach to learn about and identify as many unique species of plants and animals as possible! Anyone can participate. Dan will be there to help, but by using the iNaturalist app on your smart phone, you can capture and upload images of plants and animals that you maybe can’t identify, but the iNaturalist community can. Every legit observation counts regardless if whether the observer identifies the plant or animal themselves or not.



City Nature Challenge: Native Plant Walk

Free to attend. Registration Required.

Monday, April 29, 2024, 10:00 - 12:00 p.m. | Seward Park

This walk is geared towards folks 50+ and their families.

Join our Seattle Urban Naturalist team as we discover the magnificent native plants of the Pacific Northwest. Our day will include a brief presentation, a nature walk, and a bit of plant ID using iNaturalist.



Your local planning team for the Seattle-Tacoma City Nature Challenge includes:
Woodland Park Zoo, Point Defiance Zoo & Aquarium, Northwest Trek Wildlife Park, Seattle Parks and Recreation, Washington Department of Fish and Wildlife's Habitat at Home Program,  Green Tukwila / City of Tukwila, The Nature Conservancy in Washington, Washington Invasive Species Council, Washington State Department of Agriculture Pest Program.

Our Mission

Woodland Park Zoo saves wildlife and inspires everyone to make conservation a priority in their lives.

Land Acknowledgment

Woodland Park Zoo recognizes that these are the lands of the Tribal signatories of the Treaty of Point Elliott. We acknowledge their stewardship of this place continues to this day and that it is our responsibility to join them to restore the relationship with the living world around us.

5500 Phinney Ave. N., Seattle, WA 98103   |  206.548.2500  |

Association of Zoos & Aquariums
Seattle Parks & Recreation
Humane Certification