Agreed with @marznc - visiting is one of the best ways of learning about a place. And I would encourage you to look at public schools as well. My SO, for example, is a bio prof, and he majored in bio sci at CU Boulder - it's a fantastic program. I would rate it above both of your first choices,and you've got access to good snow and mountains...CU Boulder has a number of areas they excel in, and as an undergrad, you have the opportunity to be placed in real labs for summer jobs. It's a great school.
If you're into conservation biology and ecology, take a look at Montana State - great research programs, plus they have a number of programs that are more applied, such as fish and wildlife managment, integrated ecology and environmental sciences. What that means is that some of their biology is field-based, so you get to spend course time doing work in the mountains around the area. Again, a school that has wonderful programs and is located in Bozeman, near Big Sky.
University of Utah and University of Idaho both have excellent biology programs, but don't know much about the specifics there.
University of Calgary, in Alberta, Canada, has some of the best conservation biologists, arctic and mountain ecology-foucsed biologists and remediation biologists in the world (ie remediation biologists are people who divise ways of cleaning up man-made environmental damage - ie chemical spills, oil spills etc). The U of C also has a biology field station in Kananaskis, right in the rockies, where you can spend a semester taking classes. Many of the biologists also work on field sites, so if you get a summer placement in their labs, you could be spending time in the mountains getting paid. you've got all of the Canadian Rockies ski resorts nearby, and interior BC, along with a very active university ski club and organized bus trips to various ski resorts and ski touring locations every weekend). check out the University of Calgary Outdoor Centre - one of the largest providers of outdoor education, classes etc in North America. Anyway, I mention this Canada is an amazing bang for your buck as far as education is concerned - the programs are as good if not better in some areas than many top-tier places in the US at a fraction of the price. For example, at the u of c, international students pay higher tuition rates. But even with the higher tuition rate, it's only about 12000$ cad/year, which, as far as I know, is less than in the u.s.
I would pretty much say that, as far as biology is concerned, all of the programs mentioned above are highly ranked, many of them world-class. If you have questions about biology programs more broadly, I would happily pass them onto my SO - he has a lot more knowledge about specific programs, profs and opportunities.
Surfing the web for info is great, but campus visits are much better. email profs - you'll find them very open and eager to answer your questions. and if you want to do a campus visit, i am sure they will be more than happy to take you a tour of their labs and classrooms. we really do want undergrads to be excited about their education.