PNW-ISA furthers its mission to foster a greater appreciation of trees and promote the professional practice of arboriculture by partnering with the Tree Research and Education Endowment (TREE) Fund. With the support of donors and organizations like PNW-ISA, the TREE Fund provides:

  • Funding for scientific research into critical urban tree care issues
  • Funding for arboriculture education programs
  • Scholarships for aspiring arborists


PNW-ISA holds an annual auction benefiting the TREE Fund during the Annual Training Conference. We donate an item to the TREE Fund Gala Raise Your Hand for Research held annually at the ISA Conference. We also help Tour des Trees riders meet fundraising goals.


Visit for the latest news and updates on how the organization is working to sustain the world's urban forests.




Participate in, or support a tour des trees rider

The Tour des Trees is an annual long-distance cycling adventure which serves as the primary public outreach and community engagement event for Tree Research and Education Endowment Fund (TREE Fund). Since 1992, Tour des Trees riders have cycled through communities in the U.S., Canada and the U.K., planting trees, educating children and shining a light on the work done by arboriculture professionals and the importance of science-based tree care. To participate in, support or ride, click on this link.


Amazon Smile

You can give to TREE Fund while you shop. The TREE Fund is a registered charity with AmazonSmile—Amazon’s philanthropic program that allows shoppers to direct 0.5% of their purchase total toward a charitable organization. Shop to support TREE Fund now.



You can donate funds directly to TREE Fund or view more ways to give.