What kind of maple in my CO back yard
Can you please try to ID this tree? I think the previous owners planted it in 2002 or shortly after that, it's two stories tall now. Probably something very common at nurseries in the Denver area. I've never noticed any keys but in summer I think it has flowers that attract a lot of bees or wasps. These pictures were taken today, it never gets much fall color. Let me know what other pictures I should take. Thank you.