This is a beautifully rendered map of Portland by City Surveyor T.M. Hurlburt. It includes color coded references to the composition of many Portland streets. River depths and ferry crossings are also noted.
The “Portland Speed Association Race Tract” off of Union Avenue and Russell Street appears to be for a bicycling club, according to the meager internet references I was able to find. Was this ever built? Does anyone have any information about this track?