Measuring Big Trees Accurately
Iowa’s Big Tree Guru – Mark Rouw presents:
Measuring Big Trees Accurately
at the
Pentacrest in the Heart of University of Iowa campus
Old Capitol Museum
21 North Clinton Street
Iowa City, Iowa 52242
(We will meet on the 2nd floor. A docent will be on site to direct you to the classroom.)
Friday, October 24th, 2025 | 8am to Noon | Four ISA CEUs
$25 for IAA Members | $75 for Non-members
If you have ever perused the Iowa Big Tree Registry at:
https://experience.arcgis.com/experience/db8a533a6ca34fc89a3df0603b6b2cb4/
you have seen one name listed as the nominator way more than any other. That name is Mark Rouw. He is the Iowa Big Tree Field Representative. He knows where many of Iowa’s largest trees are, and exactly how large they are … off the top of his head!
We will be learning the history of Mark’s life mission, and how to measure trees accurately and honestly inside the historic senate chambers in the Old Capitol. Then we will be outside measuring some of the largest and coolest trees in Iowa on the beautiful Pentacrest grounds. We will see and touch several notable trees including the largest black walnut and the second largest American elm in Iowa!
A live webcam captures the beauty of the Pentacrest grounds 24/7 here: Pentacrest webcam | The University of Iowa – The University of Iowa (uiowa.edu)
A great explanation of parking options is here: Getting Here | Pentacrest Museums – The University of Iowa (uiowa.edu)
Register Online to become an IAA member here ($50)
or
Register by mail to become an IAA member here ($50)