Travel Boulder: Guide to Boulder’s Natural Attractions
“Flagstaff is Boulder’s mountain. Drive to the top of it for some of the region’s best views, and enjoy a high-end dinner at the Flagstaff House where the scenery from your table is as delicious as the dishes.
Flagstaff Mountain is old, for this area. The igneous rock that comprises this mountain dates way, way back about 1.7 billion years (originally as molten minerals deep inside the planet). The mountain you can drive up today is the result of erosion all the way down to the ancient center.”