Can you also try to help with this, today I didn't get Druid Arch (735 ft).. I tried to modify fluid consumed but no success..
I beleive Garmin has set a wrong threshold at this one. Probably a few meters higher than it should be. There are already several other users who did not get the Druid Arch badge, because they ended the activity just after reaching the threshold. I did significanlty more, and got the badge instantly, so the wrongly set threshold seems to be the only explanation.