Colorado Tree Coalition's Champion Tree Registry

How to Measure a Champion Tree

Circumference Measurement

1. Using a flexible tape measure, measure the distance around the trunk of the tree to the nearest inch. This measurement should be taken at 4 ½’ above ground level.

2. If the tree is on a slope, use the mid-point of the tree base and measure the circumference at 4 ½’ above ground level.

3. If there is a branch or growth on the trunk at 4 ½’, measure the circumference just below the branch or growth and report the height at which the measurement was taken.

4. For multi-stem trees that branch at or below  4 ½’, measure the smallest part of the trunk and record the distance above the ground at which the measurement was taken.


Height Measurement
To measure a tree’s height, an Abney hand level, clinometer, or transit is recommended. If none of these are available, you can estimate the height using a straight stick cut to the exact length of your arm. Walk away from the tree to a point where, by holding the stick vertically at arm’s length, the entire tree’s vertical centerline is hidden behind the stick. This method works best when you are at the same elevation as the base of the tree. Measure the distance to the base of the tree - this distance will be approximately the same as the tree’s height.

Crown Spread Measurement
Measure both the widest spread of the crown and the narrowest spread of the crown. Add the two measurements together, and divide by two to obtain the average crown spread.

Total Point Value
Note: The Colorado Tree Coalition will calculate the official Total Points for each nominated tree.

The total point value for a tree, according to American Forests, is calculated as follows:

Circumference (in inches)
+ Height (in feet)
+ ¼ Average Crown Spread (in feet)
= Total Points

Click this link for more detailed information on measuring Big Trees.