Page Type Page Type: Mountain/Rock
Location Lat/Lon: 39.06280°N / 106.9516°W
Additional Information Elevation: 13932 ft / 4246 m
Sign the Climber's Log

Red, Rugged and Rotten

The Pyramid Peak Massif

First, I do not recommend a climb of this mountain to anyone. I realize that people will keep going back for more high summits, but they won’t going because of me recommending this climb. For those peak baggers that have to climb it, maybe my page will prepare them for what teeters above. Second, bring your helmet and keep your party small. In my opinion the mountain is first come first serve, meaning if you get to the base of the climb and another party has started the climb, then you wait or assume all risk of rock fall potential. Finally, I thought Thunder Pyramid was more dangerous than either South Maroon or Pyramid Peak. Try climbing Pyramid Peak without the cairns and add 3 times the rock fall potential and you get Thunder Pyramid.

The standard West Face Route route is only class 3 with proper route finding but the potential for rock fall on Thunder Pyramid is as real as it gets. Essentially you have a 3,000-ft staircase choked up with never ending scree, and sharp blocks of talus. Most of this talus is bonded to the staircase with scree. The potential for a moving slope is real with every move you make. It took me almost an hour to complete the last 300-v-ft! There are no trails on the mountain; the west face is too steep and loose for a trail to ever develop. There are no cairns to help guide you through the maze of teetering blocks; any prior built cairns have crumbled and now blend in with the rest of the nondescript west face.

Thunder Pyramid Overview

Thunder Pyramid-13,832-ft

Thunder Pyramid (13,932-ft) has been hiding in the shadows of its big fourteener brother Pyramid Peak. Only 68 feet shy of the magic 14,000-ft benchmark, this reclusive mountain still falls into the Centenial Thirteener catagory (Colorado's highest 100.)

Residing only a half mile south of Pyramid Peak, the crumbling Thunder Pyramid almost blends in with its surroundings and has a reputation for being difficult to locate. From the Maroon Creek Valley, differentiating Thunder Pyramid from Point 13,820 and UN 13,722 is a difficult task. Because of its reclusive location, the summit log only sees 20-25 signatures a season.

The Pyramid Peak Massif separates the popular West Maroon Creek Valley from the very unpopular East Maroon Creek Valley. The encompassing area is loaded with interesting geology making for some of Colorado’s most beautiful land. Thunder Pyramid’s red, rugged and rotten rock is identified as a sedimentary rock from the Permian Age. This is the stuff that makes the area really pop with color: bad for climbing but sensory overload to look at. When this rock finally breaks down to soil it makes for a perfect vegetative ecosystem. Throughout the sub-alpine area below the tundra are groves of aspen trees. Above tree-line tundra produce summer wildflowers of rare beauty, where differing colors of Indian Paintbrush reign supreme.

Maroon Lake TH

Approach Pyramid Peak from the Maroon Lake TH (9,590-ft.) From Aspen, locate a round-about a half mile north on Hwy 82 and drive west on Maroon Lake Road for 9.4 miles to the parking area.

Starting June 14,2008 Maroon Creek Road restrictions will start and visitors will be directed to RFTA bus service. Buses from Aspen Highlands arrive at Maroon Lake every 20 to 30 minutes. All day users will be required to ride the bus between 9 a.m. and 5 p.m. The bus fare is $6 per adult and $4 per senior and child.

During these hours a shuttle can take you to the trailhead from Ruby Park in downtown Aspen. The shuttle ride is free. Call RFTA at 970-925-3445 or the White River National Forest at 970-925-3445 for schedules.

Author: big_g
Date: Aug 08, 2005 8:19 PM
The road up to the trailhead is restricted to day trippers only. Backpackers and climbers are welcome to drive up (in case they need to exit due to emergency after the shuttle service has stopped).

No promises that you'll find a spot at the end of the road, but you should be able to find something at either the East or West Maroon Wilderness Portals. The bus can be flagged down anywhere to take you the rest of the way.

The following was updated 6-30-2005 by Aaron Johnson

Several Colorado wilderness areas now require a free user permit to be in the wilderness, or shortly will require same. The wilderness areas are Holy Cross, Maroon Bells/Snowmass, Mount Evans, and Mount Massive. Permit tags are available at trailheads and are a two part tag. The white part goes in the box provided and the card portion is to be attached to the outside of your pack. There is currently no penalty if one does not have a permit. However, large fines could be levied within a few years for non-compliance. The preferred method now for dealing with violations is education of the users.

The reason for implementation of this required permit is the Forest Service has been unable to obtain accurate data on use patterns from the voluntary sign-in system. The estimated compliance range is currently 10-30%.

The hope is to obtain better data with this new method. While some may feel this is a precursor of some kind of quota system, the opposite is actually true. Accurate information on visitor use patterns will allow the forest service to attempt to evenly distribute impacts and encourage use of alternate trailheads for the same destinations. However, given the magnitude of the state's continuing population boom, folks should not be surprised if quotas in certain areas become a necessity.

Thanks to SP member mtnhiker13 for supplying this vital update via the Colorado Mountain Club's email service.

Specific information can be viewed here.

Current Forecast for the Maroon Lake area

  • Colorado Avalanche Information Center (CAIC)

    Click image to enlarge

    Click here to view a 7-day forecast for Thunder Pyramid

    Red Tape

    See Getting There

    Maps: Maroon Bells, White River National Forest

    Aspen Ranger District Office
    (970) 925-3445

    USDA Forest Service
    White River
    National Forest
    P.O. Box 948
    Glenwood Springs CO 81602


  • I hear that the night attendants allow climbers to sleep in their vehicles only at the TH parking area.

  • There are marked campsites at Crater Lake for those that don’t mind packing in about 1 mile. First come first serve. Remember, these sites usually get snapped up quickly for those that are interested in climbing the Maroon Bells.

  • Forest service campgrounds in the Aspen area offer everything from primitive camping to RV hookups. Maroon Creek road has three campgrounds, all of which require reservations. Call the number above and expect to pay $15.00 a night. Call as far in advance as possible for a site in this popular area. Those wishing to make reservations should call 1-800-280-CAMP. There is an $8.25 reservation service charge.

    Independence Pass Camping

    Five campgrounds along Colorado Hwy 82 via Independence Pass offer numerous sites. The following campgrounds are located on the west (Aspen side) side of the pass.

  • Difficult Campground has 47 sites and is only 5 miles from Aspen. Reservations accepted by number above.

  • Weller Lake Campground has 11 sites and is 7 miles from Aspen. First come first serve.

  • Lincoln Gulch Campground has 7 sites and is located 11 miles from Aspen. First come first serve. .

  • Lost Man Campground has nine sites and is 14.5 miles from Aspen. First come first serve.

  • The best kept secret in the area for camping is up the Lincoln Gulch Road (11 miles from Aspen) past the Lincoln Creek Grattos and close to Grizzly Reservoir where camping along this rough road is free. This is not a road for trailers.

  • Children


    Children refers to the set of objects that logically fall under a given object. For example, the Aconcagua mountain page is a child of the 'Aconcagua Group' and the 'Seven Summits.' The Aconcagua mountain itself has many routes, photos, and trip reports as children.



    Parents refers to a larger category under which an object falls. For example, theAconcagua mountain page has the 'Aconcagua Group' and the 'Seven Summits' asparents and is a parent itself to many routes, photos, and Trip Reports.

    Elk MountainsMountains & Rocks
    Colorado 13ersMountains & Rocks
    Contiguous US Highest 150Mountains & Rocks
    Elk Mountains Highest 20Mountains & Rocks