champion tree program
Similar to the National Champion Tree Registry, CTC’s Champion Tree Program maintains records of the three largest trees for each species in the state. These trees are the largest trees of their species in the state and are representative of Colorado’s rich history and diverse ecosystems. By documenting these important trees, we can promote their conservation and protection for future generations of Coloradoans.
State Champion Trees are measured in accordance with American Forests’ Measuring Guidelines and are checked and remeasured at least every 10 years. Through consistent measurement, we can ensure greater accuracy and track changes in the growth and health of trees over time.
Anyone can nominate a tree for the Champion Tree Program! CTC accepts nominations from rural and urban areas all over the state. To nominate a tree, click here. If you are re-measuring a tree, please send an email to to Neal Bamesberger listing the exact location of the tree, the new (verified) measurements and any other new information about the tree's condition, owners, etc..
Colorado’s Champions
Colorado’s State Tree - The Colorado Blue Spruce
Currently Colorado has 3 first place state and national champion blue spruce (Picea pungens). Two of the champions are in La Plata County about 10 miles north of Durango, and one outside of Sawpit, Colorado. The tree scores are 323.65, 319.62, and 315.23 points, the tallest is 180′, followed by 156′ and 154′. They are listed on the champion tree list.
State and National Champion blue spruce.
State Champion tree registry
The Colorado Tree Coalition Champion Tree Program maintains a database with records of over 800 trees. Trees are listed in the registry by their common names. To explore Colorado’s Champion Trees in a digital map, click here. The listing only includes the general location of the tree. Contact Neal Bamesberger for more specific directions.
2024 State Champion tree list sorted alphabetically
Colorado’s National Champion Trees
Colorado currently has eight trees on the American Forests National Champion Tree Register. These trees are the biggest of their species as reported to American Forests in the current year. Click the images below to see each tree’s measurements and location. Learn more about Colorado’s National Champions and others at American Forests’ National Register of Champion Trees.
National Champion Trees that have died
Plains Cottonwood, Longmont, CO
This stately tree on the Western edge of Longmont was estimated to be over 145 years old, 105 feet tall and 11.5′ feet in diameter died in 2012. It was on the National Register of Big Trees since 1964. Read here to find out how Boulder County honored this large cottonwood.
Blue spruce, Hermosa Creek Drainage near Durango, CO
In 2018 this 166’ tree was destroyed in the 416 Fire in the Hermosa Creek Drainage Area. See this Durango Herald news story for more information.