Last night, I heard clanking sounds coming from the kitchen. When I went into the kitchen and turned on the light, the sounds stopped, but when I picked up the trap I could feel that the mouse was in the box as it skittered around in distress. (The trap has one-way doors; mice can get in but not out.) I walked across the road into the outskirts of the railroad yard and lifted the lid. The terrified little mouse was trying to hide in the door where it had come in, but was betrayed by its tail. When I poked at its tail, it jumped out of the box and ran off into the sagebrush.
I hope the mouse won't make its way back into the house. It's welcome to try and make its way in the railyard, if it can avoid the feral cats and a few raptors in he area. I have no problem with field mice. It's house mice that I don't want.