With uncharacteristic promptness, I was able to edit the GPS tracks that Cathy logged on her smartwatch yesterday and get the Delaware Academy trails into OpenStreetMap.
I was only moderately surprised that nobody had mapped them previously. I was able to see some of the trails, which mostly follow long-abandoned carriage roads, on aerial images, and traced them where I could. Otherwise, I copied-n-pasted segments of GPS tracks.
The results don't look too different from the official map, so I'm fairly satisfied.
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