I've done quite a lot of star trails, but I've never focused on getting a moon trail before, so thought I'd have a go.
I've spent a lot of nights watching the moon set behind these rocks, being as I can see them from my house, I thought I'd try and capture it.
Unfortunately though I ended up having to composite, because the moon first didn't set quite vertically, and then it set off to the left, so I had to move it in Photoshop. But you get the idea what I was going for with this. The slight flare at the bottom of the moon trail was thin cloud going in front of it, making it flare out a little more.