The area around Fort Vancouver includes a lot of great attractions to see, and plenty of paths to wander. A good way to do this is to park along Evergreen Blvd, then walk either direction. You can take a short walk along Officers Row, a longer walk around Historic Fort Vancouver, or even longer walks to downtown Vancouver, to the waterfront, and around Pearson Field.
The Discovery Historic Loop Trail is a great way to get to know this part of Vancouver.