I don't know but thats beautiful!

Thank you! It was here when we moved in last fall. Our landlord's parents planted it some 7+ years ago. It is very fragrant. I did a major clean out & pruning on it in November. I can see now where I can prune it back more. The flowers on the "old" stems aren't blooming as good as the ones on the "new" growth (as expected). I'm just so happy to have a rose bush here in northern Wisconsin! I just wish I knew what I was working with.

Can you post close-up photos of the blooms and leaves, please? There are several mauve/lavender roses. Also, if fragrant, please describe (citrus, "rose", soapy).

You are in zone 4? Does it sucker? I don't know what it is either, but it Looks a little like a rose myself and another person have been trying to identify from Montana. Ours are climbers though- and tall.
Mine has little prickles all the way up the stem like beard whisker (like a moss rose?). If you do a search on Hallies rose in the forum, you might see if it looks like yours. Some people call it banshee, but the hips of Banshee are acorn shaped, so mine isnt that exactly.
Any family friends from Montana?
Good luck!

Here's a close-up. Yes, this bush is extremely fragrant. Smells like a rose!! LOL But it really does. I've done some research and I think it is a Rugosa rose, but I don't know which one.

I don't think it looks like a rugosa to me. The leaves and bloom form look wrong. It sure is a beauty!