If the weather is right, we can have blooms into November. But usually things end around mid October when the first big frost hits hard.
The roses usually give you three to four cycles of blooms. They get better as they get more established. Many do not truly hit their stride until in their third year, so if they are good when first planted they will be outstanding later. Even if they are a bit stingy on blooms the first year, they will likely increase with getting established. I am also in Colorado to the North of you in Loveland. Enjoy your new roses!!
Stan the Roseman :o)