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Tree Inventory Project

Volunteers have mapped, measured, and identified nearly 250,000 trees in Portland.

On this page

Walking around your neighborhood, do you see spaces to plant a tree, street trees in need of maintenance, and neighbors who are concerned about their trees but don't know where to begin? Through the Tree Inventory Project, Urban Forestry has helped Portlanders take action to improve their community's urban forest, one neighborhood at a time. 

Tree Information from the Inventory

History of the Tree Inventory Project

The Tree Inventory Project began with a pilot neighborhood street tree inventory in 2010. The project grew from there, with neighborhoods across the city partnering with Urban Forestry to inventory each one of Portland's 218,000 street trees and to create action-oriented neighborhood tree management plans. Starting in 2017, the project moved on to Portland's nearly 200 developed parks. In 2019, volunteers and Urban Forestry staff finished this inventory of an additional 25,000 park trees!

Active neighborhood groups that were interested in trees began by gathering volunteers to help conduct an inventory. Volunteers were guided by Urban Forestry staff, who provided training, tools, and event organization.

Together, information was collected on tree species, size, health, and location. Data was analyzed by Urban Forestry staff, and findings presented to neighborhood stakeholders at an annual Tree Summit in the fall.

At Tree Summit, neighborhood groups work to develop tree plans: setting achievable strategies to improve the health of existing trees, expand tree canopy, and connect the neighborhood with city and nonprofit resources. The resulting Neighborhood Tree Plan uses inventory findings on the current status and health of neighborhood trees to provide recommendations for specific neighborhood actions for improving the urban forest. In the past, neighborhood groups have organized young tree structural pruning workshops, secured funding to remove and replace dead or dying trees, and planted street trees in areas where inventory findings suggest they are most needed.

More than just producing data and a tree plan, the Tree Inventory Project brings communities together. Participating in the tree inventory project is a great way to meet your neighbors and connect with others who value the trees that make Portland so great!