Bing and ESRI imagery looks to me someone is maintaining about 600 ft of it, which would be consistent with these sources showing it as a model aircraft field.

I'd propose we shorten it and change it to aeroway=runway to aeroway=model_runway.

https://wiki.openstreetmap.org/wiki/Tag:aeroway%3Dmodel_runway

https://www.modelaircraft.org/site/slater-rc-field-dreams-1

https://www.facebook.com/SlaterFieldOfDreamsRcClub