Welcome to ISA Ontario


Caesars Windor Hotel & Casino will be the location of ISAO's 66th Annual Educational Conference & Trade Show.

This year’s event will be held at the spectacular Caesars Windsor Hotel & Casino, February 18th to 20th, 2015.   With such a successful 2014 Conference, we know that we will be building on that success with Caesars Windsor; a resort that defines modern luxury in the midst of timeless elegance.  Click here for more details...


26th Annual OTCC, September 13th, Pinafore Park, St. Thomas.

The beautiful city of St. Thomas will be hosting the Annual Ontario Tree Climbing Championship.  The day begins at 7:00am!  We are looking for Judges and Volunteers... click "Play a Role & Volunteer", for more information...


Harold Van Dyke Memorial Golf Tournament - Support the Canadian Tree Fund. 

TEE OFF and FUNDRAISE for the Canadian TREE Fund.   Tee off starts at 11 am, Sunday, September 7th, 2014
At The Highlands Golf Club in Bradford.   Bring your team for best ball scramble. Putting contest, door prizes and much more... For more information, click here or visit the CTF site... 

Warren Buffett
Someone's sitting in the shade today because someone planted a tree a long time ago. "Warren Buffett"

Our mission is to enhance and promote the care and benefit of trees for present and future generations in Ontario through education, research and awareness.

News & Events

Aug 22
ISA is holding a special election...Deadline August 29.
Aug 05
The OTCC organizing committee is looking for future parks to host the OTCC...
Aug 05
Krista Strating placed an incredible 8th place with Riley Brown placing an amazing 25th place!
Jul 24
Support TEAM CANADA as they tour Wisconsin!