Don't know if you have established some good base miles yet or not, and how much time before you go to Montana and Colorado, but, if you have established a good amout of base miles in you legs, and you have several weeks before you go, hill intervals (hill repeats) once a week pay off very well in improving one's climbing prowess. It's very hard work, will have you gasping for air, legs will be in pain, but you are rewarded with great improvements in climbing in the weeks afterwards. I don't have time to get much into the details of how to do intervals right now but please look up some training info regarding intervals for more info. I've never been a climber but nothing was so sweeter than how I was able to stay with the strong climbers and even leave some people much lighter then I, on some very tough climbs and on hilly training rides (back in my racing and century days), all after doing 3 - 6 weeks of hill intervals! Good luck whatever you do!