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Welcome to TreeOpp

A community innovation that transforms an environmental challenge into art and social change.


This program recognizes our community’s entrepreneurial spirit, our  commitment to sustainable practices and the value of partnering together to turn challenges into opportunities. - City Manager Jane Brautigam

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When I first heard about the TreeOpp program, I was excited and signed  up right away. I know this is going to be amazing and I can’t wait to  learn more about the art of woodworking. - Maria Carrillo Garcia, TreeOpp apprentice

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Get Involved

Buy TreeOpp Lumber

Make your own art and products out of local, reclaimed ash wood! Lumber from public ash trees will be for sale at ReSource. Quantities are limited. 

Learn about TreeOpp and the woodworking process 

More woodworking classes coming at the Boulder Public Library's BLDG 61!
Upcoming woodworking classes

Buy reclaimed ash art + useable products

Thanks to all who bought TreeOpp products at our most recent sale Dec. 15. More products will be for sale soon and updated here. TreeOpp Products

Ash trees on private property

Learn what you can do with ash trees on your private property:

Share your comments, feedback and ideas with us!

TreeOpp feedback


Developing the apprenticeship program is an opportunity to share my  love of woodworking with individuals from Bridge House who are excited  to learn and develop a new skillset. It is beyond rewarding.  -  Janet Hollingsworth, woodworking instructor and creative technologist at BLDG 61 Makerspace

In the News

Four Things We Learned From Knight City Challenge Winners

MakerBus: How Cities Can Embrace the Maker Movement and Create Social Change

Next City: There's a Human Upside to Boulder's Insect Invasion

Fablearn Fellows: Informal Maker Programs Make Deep Connections

Daily Camera: Boulder's repurposing of emerald ash trees also gives homeless new hope

Make Community: Boulder Library's BLDG 61 Makerspace Apprenticeship Program

Community Foundation: The Foundation's Role as Community Resource, Convener and Connector

Boulder Weekly: Metamorphosis - Local art program #TreeOpp teaches wood skills to the homeless

Knight Foundation: Four Tips for Submitting a Successful Knight Cities Challenge Application

Maker Ed: Post-Maker Faire Musings on Creating a Supportive Environment Through Making

Daily Camera: Boulder wins $200K to train homeless to repurpose trees infested by ash borer

9News: Boulder has found a use for trees killed by the emerald ash borer

The Denver Channel: Boulder Grant to Help Recycle Emerald Ash Borer-Killed Trees and Give Homeless Jobs


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The project reflects Boulder's characteristic resourcefulness, utilizing  what most would think of as a nuisance into reusable natural resources  to benefit the community. - Lilly Weinberg, Knight Foundation director for community foundations

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Join the Conversation

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Boulder Public Library
Boulder Parks and Recreation
Bridge House





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TreeOpp Crew Alumni 

Click on any image to see larger images.

TreeOpp Crews 1 & 2


Emerald Ash Borer (EAB) Information

Boulder City Council Study Session Memo: EAB in the City of Boulder pdf

Knight Cities Challenge



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Click to read the TreeOpp story.

Our story

Community Partners


Boulder Parks and Recreation Logo BLDG 61 Makerspace Bridge House Logo Knight Cities Challenge Logo

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