Hoyt Arboretum Friends (HAF) is a membership-based, nonprofit organization working in partnership with Portland Parks and Recreation to support Hoyt Arboretum.

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A Living Museum

Hoyt Arboretum provides a living classroom for students and teachers. A variety of educational and exploratory brochures are available at the Visitor Center. 

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Events & Classes

Upcoming Events & Classes

New events and classes have been posted to the calendar - check out our schedule, and learn something new today!

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Seasonal Highlights

It's spring at Hoyt Arboretum! Find our where you can best enjoy the spring season along our 12 miles of hiking trails.

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Please Support Us

Support for the Arboretum comes in many forms. For instance, you can become a member, send a donation, make a commemorative gift or volunteer your time.

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Support the Trees in Arbor Month

April is Arbor Month in Portland and a time when we put extra effort into nurturing and celebrating our museum of 6,000 living trees.

You can help support your arboretum with a donation that goes directly to maintaining the collection. Thanks to a generous donor, your contribution will be matched up to $12,000, so your gift is doubled and twice as important!

Your investment in Hoyt Arboretum will help us fertilize and prune our trees, acquire seedlings to expand the collection and purchase nourishing mulch. You can help keep over 2,000 species of trees and plants healthy and inviting by making your tax-deductible gift here.

Remember, every gift of $35 or more makes you a member of Hoyt Arboretum Friends!

Welcome to Hoyt Arboretum


At Hoyt Arboretum, every tree has a story to tell. Founded in 1928 to conserve endangered species and educate the community, Hoyt Arboretum encompasses 187 ridge-top acres, accessible by 12 miles of hiking trails. A place of beauty and serenity in all seasons, Hoyt Arboretum is easily accessible from anywhere in the Portland metropolitan area by car, bus or the MAX light rail. You will also find parking, restroom facilities, ADA accessible trails and ADA parking at or near the Visitor Center. 

An arboretum is a promise to future generations. Just as we are enjoying mature and wonderful trees that were planted many years ago, the trees we plant today will grow to provide shade, beauty and value for decades and centuries to come. More than 6,000 specimens from around the world grow here, including more than 1,400 species. Hoyt Arboretum is a living laboratory where anyone can enjoy trees and plants that are both familiar and unexpected.

Join us today and explore Portland's museum of living trees!


HAF 2012 Annual Report

Last year, HAF:
~Installed 269 new trail signs and 8 map panels in the Arboretum,
~Planted the Cotoneaster research collection in collaboration with OSU,
~Increased revenue by $194,723 over 2011.

Click on 2012 Annual Report to read the full report.