Surrounding the City of Vancouver water treatment facility is a natural wooded area with trails meandering through out it. In total there is likely a mile of trails. Most of the trails are wide, level and well used, making it easy to wander for some time. This is a great place to stroll through a forest.
Ellsworth Springs East, neighbor’s pond. 
Ellsworth Springs East 
Ellsworth Springs East 
Ellsworth Springs East, entrance at SE 98th Ave 
Ellsworth Springs East 
Ellsworth Springs East
There are entrances to the natural area at the corner of SE 102nd Ave and SE 15th St, at the end of SE 98th Ave, and on SE 16th St.
I grew up on those trails. We lived all around them. I remember the storm that knocked down those leaning trees, it created a second floor of tree-trails you could walk on.