Wow, this is a great thread!
About 10 years ago at a trailhead, I turned my garmin on and set it down while I put boots on etc. Forgot about it and didn't remember until I was too far down the trail to go back. Stupid thing is that I forgot about it when I got back and drove off without even thinking about it until I got home. It was about $250 new and was already a few years old so I never bothered to go look for it.
About 10 years ago at a trailhead, I turned my garmin on and set it down while I put boots on etc. Forgot about it and didn't remember until I was too far down the trail to go back. Stupid thing is that I forgot about it when I got back and drove off without even thinking about it until I got home. It was about $250 new and was already a few years old so I never bothered to go look for it.