I happened to be in Boulder today fulfilling some other Find A Grave photo requests so I went to Green Mountain to take care of yours.
I have posted a photo of Donna's marker, as well as an overall picture of her grave site. Next to her marker is one for Stanley Offerle; I'm not sure if he is related or not. The stone bench has the name of Offerle on it as well.
If you would like a high resolution copy of the photos, just email me, and I will send them to you.
I'm sorry for the loss of your mom. I hope the photos meet your satisfaction.