suggest re-tagging this as something that better describes what this is as a leisure recreational RC field rather than a airport as airport is a misleading tag for this feature. Unclear what tags that would be though.

This road is in the incorrect location, it's more southern if you compare it to satellite images. Also, the location this marker is at should be identified as Gover Ranch.

missing path branching left here and meeting up with secluded loop to the north

Underhill Trailhead

West Boundary Trail off of Mowich Lake Road

Log crossing

via StreetComplete 58.2

Attached photo(s):
https://westnordost.de/p/231796.jpg

End of maintained trail

via StreetComplete 58.2

Attached photo(s):
https://westnordost.de/p/231797.jpg

Eliza Island needs gps traces for roads. Tiger Data is wrong as well as Whatcom County. Ferry only runs in summer. Plan accordingly.

Trails in Dog Woods need GPX mapping.

I believe this road is unpaved from about here to the end of the road as you head east.