Do you remember what the blooms looked like?

I do not remember what the blooms look like. Maybe I will have to wait until next year...

Probably a rosa multiflora. Non-native and invasive.

The growth pattern is more upright than I am used to seeing from Rosa Multiflora. Here it forms a mounding thicket.

porkpal said:The growth pattern is more upright than I am used to seeing from Rosa Multiflora. Here it forms a mounding thicket.

Perhaps it originally tried to climb the fence and then ended up spilling over it.

There's a key to the native roses of Michigan here:

https://michiganflora.net/genu...

Frank, another not-native possibility is the Dog rose, see it here: https://en.wikipedia.org/wiki/...

Here in Ingham County, MI it is sometimes found around old farmhouses -- I think it used to used as an understock in grafting, and when the non-hardy top died...the Dog rose took over. I transplanted some to my garden; I just saw "rose" in the early spring, and I didn't know what it was. Now, twenty or so years later, it has gently, with the help of the birds, seeded around the place. Tall and upright, not sprawly wide like R. multiflora. It makes quite the show in the spring with its distinctive pink flowers.