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Parks & Recreation

Healthy Parks, Healthy Portland

Phone: 503-823-PLAY (7529)

Fax: 503-823-6007

1120 SW Fifth Ave., Suite 1302, Portland, OR 97204


Portland's street tree inventory is complete! Volunteers in the roles below helped to identify, assess, and map over 200,000 trees. To hear about the Tree Inventory Project, register for the Tree Summit on November 5th. 

1. Team Leader

Team Leaders are responsible for data collection on inventory work days, acting as experts in tree identification, and leading volunteers on data collection routes. Team Leaders are also the public face of the Tree Inventory Project, educating the public about the program and the importance of street trees to our communities. No experience is necessary - Team Leaders must attend a half-day training to learn inventory protocol and how to identify trees.


  • Attend at least four inventory work days.
  • Lead novice volunteers on work days to map, measure, and identify street trees.
  • Ensure that data collected is correct, legible, and complete.
  • Answer questions of the public about the Tree Inventory Project. Understand and promote the community benefits of trees.

2. Data Collector: Help collect data during an inventory work day

Volunteers are needed to help collect data on inventory work days. Work days are held Wednesdays and Saturdays from June through September. Saturday work days occur from 8:30 am to noon; Wednesday work days are evening events, beginning at 4:30 pm. No experience is necessary, as novice volunteers will be paired with a Team Leader to identify trees and explain the inventory protocol. Duties include measuring trees, recording data on trees and the site, and mapping trees. Advanced registration via the website is requested.  View the inventory protocol here.

  • Please register for each inventory day via links posted on the schedule here.

3. ArcGIS Data Entry

Join Urban Forestry staff at our office in Delta Park to enter inventory data into an ArcGIS database. Experience with Microsoft Windows operating systems is required, and familiarity with ArcGIS and ESRI software is strongly desired and encouraged. Weekly 3.5 hour shifts are available from 7:30 am – 11:00 am and 12pm -3:30pm on most shifts Monday-Friday starting in mid-July. A 30 hour minimum commitment is requested from each volunteer between mid-July and early October.

The application form for GIS data entry volunteer opportunities is available and accepted until June for the first volunteer opportunities. In compliance with Parks Bureau protocol, each volunteer must also submit forms for criminal background checks. By early June, volunteers will first be notified of their acceptance. Volunteers will then attend one of the following training sessions. Pre-registration is required and will be online. Training registration and background paperwork will be available for selected applicants in late May to early June.

  • Friday, July 8 at the Portland Building, 1120 SW 5th Ave., 14th floor, EBS training room.
    • 9 am - noon:  Focused on those will basic PC and GIS experience.
    • 1pm - 3:00pm:  For those with advanced GIS experience
  • Wednesday, August 17 at the Portland Building, 1120 SW 5th Ave., 14th floor, EBS training room.
    • 9 am - noon:  Focused on those will basic PC and GIS experience.
    • 1pm - 3:00 pm:  For those with advanced GIS experience.

4. Arborist-on-Call

If you are a certified arborist, horticulturalist, or other tree care professional with excellent tree identification skills, volunteer to be an Arborist-on-Call during inventory work days. Arborists-on-Call check in with inventory teams to problem solve and answer questions about tree identification, condition assessment, high voltage wire recognition, and other questions that may arise. Volunteers will need a cell phone and bike or car. Advance registration is required and a training guide is provided.

5. Tree Team Member

In addition to collecting tree data, Tree Teams in each neighborhood are responsible for securing locations, advertising, and recruiting volunteers. After inventories are complete, they will also work with their communities to create neighborhood tree plans to steward the neighborhood’s tree canopy. If you live in one of the neighborhoods and are looking for a long term commitment to improve your neighborhood’s urban forest, joining the Tree Team may be for you.