We watched this neighborhood develop back when we were cycling regularly on Skyline Blvd. Now it is a source of interesting trails.
Northwest Heights 45.5330753, -122.7843005 45.5479934, -122.7543089 OVERLAY http://trails.ward.asia.wiki.org/assets/pages/northwest-heights-trail-overlay/IMG_6393.png 45.5290174, -122.7861373 45.5532064, -122.7571958
This map photographed from a posted trail map with a little bit of keystone. Cleaned up in Preview with Instant Alpha. enlarge 
pages/northwest-heights-trail-overlay