Hoyt Arboretum 
4000 SW Fairview Blvd
Portland, OR 97221
503-865-8733
http://www.hoytarboretum.org/
Arboretum: Walk
Hoyt Arboretum offers tours, classes, and special events throughout the year. Free guided tours are offered at 2:00 p.m. each Saturday and Sunday from April through October. Classes in tree care and horticulture are held throughout the year.