Colorado 13ers

The list after the list

Finish the fourteeners and Colorado hands you another 583 summits between 13,000 and 13,999 feet. The thirteeners are where the crowds disappear: no trail on many of them, no guidebook for some, and a summit register that might have three names from the past decade. For a lot of experienced Colorado climbers it's the real project, and finishing it is a multi-decade effort that maybe a few dozen people have completed.

This map uses the ranked list — every peak with at least 300 feet of prominence — with LiDAR-revised elevations, which moved a handful of peaks across the 13,000-foot line in recent years. Unnamed peaks go by their elevation, so you'll see entries like "UN 13,552"; names in quotation marks are climbers' nicknames that have stuck but aren't official. Peaks that share a name carry a letter suffix, which is how you tell the five Grizzly Peaks apart.

Working through 583 peaks

The San Juans hold 249 of them, nearly half the list, which is why San Juan locals have an outsized share of the finishers. The Sawatch has 118, many of them long ridge walks off the fourteeners you've already done. The Front Range's 57 are the most accessible and a good place to start; James Peak, Mount Audubon, and the peaks around Rocky Mountain National Park are straightforward days.

Because the badge grid is grouped by range and sorted by height, it doubles as a planning tool — zoom the map into a basin and you'll see which summits cluster together for a single trip. Click to mark a peak summited, again for want-to-climb. Your 14er progress lives on its own map.

How the list is kept

There's no governing club for the thirteeners the way there is for the 14ers, so the community relies on a few maintained lists — chiefly Lists of John and the climb13ers.com database, which this map follows — and on LiDAR surveys that have been quietly revising Colorado's elevations since 2020. When a survey adds or drops a peak, the list changes, which is why the count here is 583 and older guidebooks say 584 or 637. Expect it to move again. The codes on this map are fixed to each summit, so your ticks are safe even when the numbers shift.