Engage With Us! Record your outdoor observations, share with fellow naturalists, and discuss your findings in Broomfield. 

What is iNaturalist?

iNaturalist is a website where people can report their observations of all types of organisms, from animals to fungi! Broomfield Open Space and Trails has created a project on iNaturalist for everyone to submit observations, findings and questions from across the county. It doesn’t have to be on open space, it could even be something you saw in your backyard! You can use iNaturalist to get help with species identification and to record where you observed something. The site works on a “crowdsourced identification system” where you can upload an image or a sound clip of the organism you observed and other users of the website help you identify it. An image or sound clip is encouraged but not required to submit observations.

How do I participate?

Participate in this project in 4 easy steps!  
1. Visit
2. Click the red button to "Add Observations" 
3. Start a new account with an email 
4. Start submitting your findings! 

Join the City Nature Challenge!

Which city in the world has the most nature? More importantly, which city’s residents are most engaged in that nature? Of course, the answer is the Boulder-Denver Area (Broomfield included!), but we need your help to prove it! Join the City Nature Challenge, and help the Boulder-Denver Metro Area compete against over 60 cities around the world to see which can document the most nature in only 4 days!

City Nature Challenge logopaintedladyiNaturalist logo

Participating is easy! Just download the free iNaturalist app, join the Boulder-Denver Metro Area Project, then get outside and start taking pictures of the nature around you. Observe any plants, animals, or bugs in state parks, open spaces, city parks, your backyard, or even cracks in the pavement. It’s all city nature! Just no pets or house plants, please. Post your observations to the iNaturalist app April 26-29, and the community of naturalists will help identify them. If you’re unable to go out and make observations, you can still help by identifying observations, April 30 - May 5. This is incredibly important because we can only count observations that are identified to the species level.

In last year’s City Nature Challenge, 68 cities together made over 440,000 observations. Over 8,600 species were identified, 599 of which were endangered, threatened, or rare! While this is a “competition” between cities, everyone is a winner in the end because with each observation we all learn more about the nature around us. We hope you'll participate in City Nature Challenge this year, not only to help Denver (and Broomfield!) win, but also to help increase scientific knowledge of the urban-nature interface. Thank you, and may the best city win!

Visit the Open Space and Trails website for more information.


Watch Tutorial Videos on how to submit observations.  The project is maintained by Broomfield Open Space & Trails. If you have any questions, please contact Pete Dunlaevy at 303.438.6216 or by emailing.