She is in the moderate stage of Alzheimer's and still functions quite independently. I live with her and we have a split bedroom floor plan. After I go to sleep she gets up and wanders the house most of the night finally going to sleep for a couple hours or so in her recliner in the living room.
Jeanne, your suggestion of a walk is simple, yet basic and rewarding. I think so often of the Nature Deficit Syndrome that's been identified as people spend more time indoors with electronic devices and lose contact with the basic rewards of being outside.
It's especially nice now as the heat has left and the autumn coolness is so refreshing.
You might even meet some neighbors working outside, walking their dogs (good therapy for young, middle and older folks to get acquainted with the local canine population). Perhaps a cup of one of the herbal teas that's sleep inducing when you return would be a nice way to end the day.
Depending also on her cognitive level, you could try local senior citizen's centers, your community's recreational activities (which used to be called adult ed in my area), which sometimes include simple classes.
Libraries have various programs, including free concerts. They might be the most appealing to your mother. In our area, there are generally several free music programs throughout the summer, waning off in the fall, and sometimes being offered again around Christmas.
If she has any interest in crafts and can follow visual cues, Michael's and Jo-anns both have crafts classes.
Museums have rotating exhibits.
I don't know if being in public with a lot of strangers might be distracting though.
If she keeps you awake at night, this is a problem.
If she is apt to take a few extra pills at night, or turn on burners, etc., this is a problem.
Could you provide a little more information?
One option might be to switch her regular bed for a daybed. It's wider in the cushion area than a sofa, but it also has a back as a sofa does so it can protect against winter chills.
I slept on the sofa for several months when my mother stayed with me and I gave her my bed. I actually grew to like it. For an older person who might be vulnerable, a sofa provides a backing protection.
I have asked her why she does this. She says she sleeps better on the sofa. It is rather inconvenient, since in essence she occupies the whole house in the morning by sleeping on the sofa.
I sleep comfortably in a recliner along side the bed,