Location of a former school along the tracks.

I believe that this is the Riverside School (check out the map!). One of the structures on this property was built in 1900, and I believe this is the one.

I've recently acquired some new maps from the Seattle Municipal Archives (I'll MapCrunch them soon hopefully). Two of them cover this spot, one when it was built and one when it was dismantled. Both have a "School House Siding" for the tracks right next to a school. On the 1912 map it's called "Riverside School" on Stirrat and Goetz investment company land; the outline of the building matches the one I've pinned in the Local Live map. On the 1933 map the property is referred to as "School King Co Dist #70."

Unfortunately there isn't much information about the Riverside area online (for example, Historylink). It's almost entirely industrial or preserved land now, though there are a few houses left near Spokane Street.

I'm not sure what shape the building is. As a relic of a forgotten neighborhood, it might be worth holding onto.

Oh, the tracks were just to the west. They hugged the edge of the hill on "Detroit Ave" south from a junction with West Marginal/Iowa. Then a bit south of this point the tracks started working up the hill until merging with the later-built Burien Way.