A little out of the way (by which I mean towards Gresham), Powell Butte offers some great trails through varied scenery and a wonderful view of Mount Hood.
Fall: 7:00 AM-8:00 PM (Labor Day until switch to Pacific Standard Time)
Winter: 7:00 AM-6:00 PM (until switch to Daylight Savings Time)
Spring: 7:00 AM-8:00 PM (until Memorial Day)
Summer: 7:00 AM-10:00 PM (Memorial Day to Labor Day)
While the construction continues at Powell Butte, refer to this page from the City to know which paths and parking lots may be effected.
If you find any factual innaccuracies in this post, please email me via richard at thingstodoinportland dot org so I can fix it for everyone. Thanks in advance!
16160 SE Powell Blvd, Portland [Google map].