I too am in Colorado. Peep sights work for me a whole bunch better than regular open sights. Take your rifle to a gunsmith - have him/her replace the front sight's fiber optic rod with a green one. They are the .040 diameter rods available in Brownell's or from Dawson precision.Green is a lot more visible in low light than red or orange.

Get rid of the open rear sight and install a Williams receiver sight in the holes where the rear scope base is supposed to go. You just look through the peep, essentially forget its there, and put the green dot on the target. A .040 green dot represents about 6" at 100 yards. Pretty fine aiming point, as far as open sights go. I can shoot 2" groups pretty consistently, with certain loads off the bench, and this sight combination. Plenty good enough for "minute of elk" accuracy.