The appropriately named Trail of Ten Falls is absolutely worth the 60-mile drive south of Portland. The loop features falls short, tall, wide, and small, white water streams and shallow pools galore. You'll feel like you're strolling through your grandmother's nature calendar.
Although pets are not allowed on the main trail, it is surrounded by horse trails and bike paths.
And no need to rush back to the big city. Silver Falls is surrounded by Willamette Valley wineries. In Silverton, the Edward Adams House is a highly regarded bed & breakfast.