City Nature Challenge

Boulder: April 27-30, 2018

Which city has the most nature? 


The 2018 City Nature Challenge will help us find out! Over 65 cities from around the world are asking people to explore nature in their urban areas and document the species they observe. Last year, 126,000 observations were recorded.

Help us show the world how biodiverse Boulder County is by making as many observations of as many species as possible from April 27-30, 2018! Document nature in your backyard, by your school, in your favorite park or open space area, and upload your observations to iNaturalist, an online platform for citizen scientists. Any observations of plants, animals, and fungus found throughout the County will count.

Not only will your observations help build up the baseline of Boulder County biodiversity, but it will provide local land managers with the data they need to protect these wild species.

Boulder’s City Nature Challenge is organized by the Wild Boulder team, a collaborative program of the City of Boulder, Boulder County, and the WILD Foundation. 


View the City Nature Challenge Project on iNaturalist

Bioblitz kick-off event on April 27th


Join the Wild Boulder team on Friday, April 27th from 4:00-7:00 pm at Foothills Community Park to kick off the City Nature Challenge! Attendees will learn more about the City Nature Challenge and and the long-term Wild Boulder initiative, participate in guided hikes to collect observations, feast on local food and beverages, enjoy face painting, live music by 80s cover band The Goonies, prize giveaways, and more. This event is free and open to the public, so bring your friends and family members!

Also participating in this event:

Boulder Pollinator Garden Project
Butterfly Pavilion
Colorado Parks & Wildlife
The Compañeras
CU Museum of Natural History
Reality Garage
Wild Bear Nature Center

Boulder’s 2018 City Nature Challenge is brought to you by the Wild Boulder team

The Boulder County Wildlife Project, nicknamed “Wild Boulder,” is a call for community members to take an active role in protecting our open spaces and wildlife. By participating as citizen scientists, individuals will provide local land managers with a stronger understanding of where and when these animals are being observed, and what they need to thrive in this unique ecosystem we call home.

Wildlife found here in Boulder County and across the globe face numerous threats, ranging from climate change, urban sprawl, habitat loss, invasive species, and more. To better understand how wild species are responding to these pressures, it is essential to build and support a local community of citizen scientists to collect data on the abundance and distribution of wildlife and their habitats.


A collaboration through the City of Boulder, Boulder County, and the WILD Foundation

This partnership represents a local commitment to citizen science, which leverages the community as a valuable resource to enhance research efforts and increase the pool of data. Citizen science is a creative way to connect residents to our environment and unite them in a common effort.


Partner with us


Get involved through one of the following levels below. Have another idea? Contact Melanie Hill and Kate Busse


Spread the word:

  • Hang flyers
  • Advertise on your website
  • Share on social media
  • Share via email or newsletter
  • Share with your network, partners, colleagues, friends

You’ll be recognized on our website as a Community Outreach Partner.



Get involved with the community:

  • Set up a table at our event
  • Organize/lead programs, events, guided hikes, school projects, etc.
  • Help the Wild Boulder team plan City Nature Challenge events and programs

You’ll be recognized on our website, marketing materials, and event programs/calendars.


Support the Wild Boulder team:

  • Make a tax-deductible donation to the Wild Boulder project
  • Sponsor our main event
  • Sponsor our other programs
  • Make an in-kind donation

You’ll be recognized on all print and digital event materials, signage at the event, receive a sponsor spotlight, and can set up a table at our event.

School competitions

Time to get competitive! From April 27-30, 2018, Boulder will be competing against Denver and 65 other cities throughout the country to see who has the most nature. Show off your school spirit by starting your very own school nature challenge. All observations that take place throughout the county will help Wild Boulder win the larger challenge! Here are a few examples of how you can get involved; we encourage you to engage your class in creative ways best suited for your students.

Student vs. Student: A single class can hold a competition for its students to see who can make the most observations during the period.

Class vs. Class: One class challenges another class either in the same grade level or another to see which class can collectively gather the most observations.

School vs. School: Does your school have a significant rival in the area or one you already collaborate with? Challenge that school to a competition!

View the City Nature Challenge Education Toolkit for more ideas >

The City Nature Challenge is organized by:


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