Trees and Forests

Student wearing orange vest holding tree core sample showing years of growth
Tree Core Sample-Basic Forestry Shortcourse
Students measuring plot size with tape and counting live trees
Measuring seedling survival on replanted clearcut
Students learning about survival assessment on reforested site
Students learning about survival assessment on reforested site
Willow, twinberry, Douglas-fir, flowering Oregon grape and grass along stream
Successful riparian restoration on Milk Creek
Students learning about weed control in perennial weed infested replanted site
Bruce Kelpsas sharing knowledge at Weed Management Workshop
20 years of selective harvesting

Announcement Items

Woodland Notes Newsletter Summer 2017 edition now available

Community Forestry Day, September 9, 2017, 8:30 am - 2:30 pm.  Hopkins Demonstration Forest, 16750 S Brockway Rd, Oregon City, OR. Everyone welcome. Please let us know you're coming by contacting to be added for lunch. If you need more information contact Peter Matzka at

Riparian Buffer Demonstration Workshop for Forest Landowners, Thursday, September 14, 2017, 9:00 am - 3:00 pm, Hopkins Demonstration Forest, 16750 S Brockway Rd, Oregon City, OR. Oregon's new riparian rules were adopted July 1, 2017. There is no fee. Dress for the field, and bring lunch and water. Registration is required. Contact to register or for questions or call 503-655-8631.

Stroda Brothers Tree Farm Tour, Monday, September 18, 2017, 2:00 - 6:00 pm. Stroda Brothers Tree Farm, 24320 Territorial Rd., Monroe, OR. Come see the new techniques and ideas at the Stroda Brothers Tree Farm. RSVP by September 13. Please contact or call Judy at 971-801-0393.

Seed and Seedling Field Tour, Wednesday, October 4, 2017, 9:00 - 3:00 pm, IFA Nursery, 1887 N. Holly St., Canby, OR. Learn the complete process from cone processing to hardening off.  The cost is $15 per person for transportation and handouts. Bring your own sack lunch and water. Dress for rain or shine field conditions Register at the PACE website. Questions?

Tree School

Tree School, March 24, 2018.

Get Help:

Christmas Trees
Home Landscape

Introduction to Clackamas Extension Forestry

Growing and managing trees is a big business in Clackamas County. The OSU Extension Forestry program provides cutting edge education and research support for tree growers in Clackamas County.

Extension Publications

Natural Resources

Field Research

Field Research addresses local problems and needs.

Forest Landowner Resources

Service Provider Lists: up-to-date lists of contractor services

Forest landowner resources

Office and field consultations and visits.

Get involved

Find us on Facebook: OSU Forestry and Natural Resources Extension

Master Woodland Manager: volunteer training and community service


Demonstration and learning forests

Hopkins near Beavercreek and Ram's Dell near Dickey Prairie.

Frequently Asked Questions

(FAQs). See if yours is here!

Oregon Small Woodlands Association Annual Meeting
June 13, 3:00 – June 15, 2013
Roseburg, OR
OSWA’s 53rd Annual Meeting will be hosted by OSWA’s Douglas County Chapter at the Douglas County Fairgrounds. The theme is “Family forests our Legacy our Future – It’s a Family Thing”. The OSWA schedule includes: Thursday, June 13, OSWA Board meeting Friday, June 14, Program and Annual Membership meeting Saturday, June 15, Outstanding Tree Farmer of the Year and Howdy Neighbor woods tour Registration required. Contact OSWA for more information at 503-588-1813.
Field tour of Meripah Woodland
June 26, 2013
6:00 pm – 9:00 pm Twilight Tour
Estacada, OR
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