There are 9 peaks in Idaho over 12,000', the "12ers".

"Massive Mania" is what Gerry Roach calls the Mt Massive (14,421', Colorado's second highest peak) traverse with an ascent of the North Ridge Route (from the Windsor Lake trailhead) and a descent of the Southeast Ridge Route (to the Mt Massive trailhead).  It is about 12 miles, with 5000' of elevation gain.  The route climbs some unranked summits:

The Mosquito and Tenmile Ranges are a single high ridge of mountains in central Colorado. These two ranges are divided by where the Continental Divide crosses the ridge - in the area of Clinton and McNamee Peaks.