A Few Mountain Mod A-frames by theDenverEye | Boulder, Homes Photos taken through the trees… variations of the mountain-mod A-Frame home. This first one is on Lookout Mountain in Golden. The rest of these are from the mountains of Boulder. All of these homes were likely built in the 1960s/early ’70s. Related Posts from theDenverEye!Mountain ModernBoulder Mountain HomesAstronauts in BoulderBrenton HouseArt Deco HomeMenkick HouseBoulder Haertling House