My wife and I thoroughly enjoyed the eight hour "Ultimate Summer Trip" tour which took us to Mount Evans and Idaho Springs. Picked up at the lobby entrance to the Sheraton Hotel, we were the only Americans in the small, comfortable, ~20 seat tour bus, and had a great time chatting with the mostly Australian (plus a few Canadians) group. Our tour guide, Ed, was friendly, chatty, informative, and kept us entertained the whole time. Mount Evans was great, wonderful views. Keep in mind that there is a 40-50 degree temperature drop from downtown Denver to the top of the peak, plus a generous wind chill, which on the day we visited was in the low 30s (it was in the mid 90s that day in Denver), so bring your jackets!