Page Type Page Type: Mountain/Rock
Location Lat/Lon: 36.90836°N / 118.37045°W
Additional Information County: Inyo/Fresno
Activities Activities: Mountaineering
Additional Information Elevation: 12473 ft / 3802 m
Sign the Climber's Log


Colosseum is on the Sierra Crest just north of Sawmill Pass and south of Armstrong Col. It has a beautiful view and it is an SPS list peak. It's easy class 2 from the southwest. The SPS calls it a class 1 peak - I suppose it's as 'class 1' as Mt. Langley is - pick you route, walk slowly, and you could keep your hands in your pockets the whole way.

Which Summit?


True Summit

12473, NOT 12450

It is at 36.9083,-118.37045,LL WGS84(G1150),-2883382.1,4806570.2,UTM17N  NAD83(CORS96). The correct summit is the western one - it is 22 feet higher, and has the summit register, while the eastern summit shows a vertical control point (X) on the 7.5 minute USGS Aberdeen quad, labeled 3794.9 (meters). I climbed the wrong summit first (because I had downloaded a waypoint placed there), and then the right one. Pictures I took of each summit from the other one indicate that the western summit is higher. I suppose that the eastern summit, having a better view of the Owens Valley, served the purposes of the surveyors better, so it got the vertical control point and the "X" on the map. The 2 summits are only about 10 minutes apart, so climb both! As of August 2017, the Sierra Peaks Section (SPS) recognizes the higher, western summit as the proper peak.

What Elevation?

The Elevation 12473 is shown on the Mt. Pinchot USGS 15 minute quadrangle. The SPS peaks list and many other references show the elevation as 12,451 ft., or 3795 meters - obviously derived from the eastern summit elevation. The western summit is clearly higher when viewed from the eastern summit.

Getting There

Most quickly approached from the east via Sawmill Pass or Armstrong Canyon. Drive in on US 395 between Independence and Big Pine. For driving instructions to Sawmill Pass or Armstrong Canyon, see

From Sawmill or Armstrong, go to "Colosseum Col" west of the summit for a class 1 ascent up Colosseum's west ridge. There are several class 2-3 shortcuts up from the valleys north and south of Colosseum Col.

The north ridge (from Armstrong Col) is variously described as class 3 by Secor, class 4 "generally chosen in error" by Voge-Smatko, class 4 by Roper, class 3-4 by Matthew, and "nasty" or "really nasty" by Nile. See Nile's detailed report at

Sawmill Pass is one of the best kept secrets of the Eastern Sierra. We met a guy named Don camped at the beautiful Sawmill Meadow who said it was his 45th year in a row coming there(!!!) and he almost never saw anybody there in May. Sawmill Lake is a magnificent place to camp and fish. Then, just over the pass you can see the lovely Woods Lake. What keeps the secret so well is the first 4 miles of trail. It starts out going through dry brush and cactus at about 4500 ft. elevation. We had no trouble starting out at 1030 am on an unusually cold Memorial Day weekend, but Kathy says starting at 5 am in June was too late to avoid the heat and misery of going uphill on a sandy trail with no water for so long. After that, it's glorious ( at least it is in a wet spring season). Some places, grass is growing in the middle of the trail, which to me, is a rare and treasured sign of the peace and solitude to be found there. I hope it stays that way.

Red Tape

A wilderness permit is required for overnight travel in this area. There may be restrictions due to the Sierra Nevada Bighorn Sheep. Dogs are not allowed. Info on permits is given at Trail quota is 10 per day at Sawmill Pass Trail, see JOHN MUIR WILDERNESS at the Trailhead Quotas page.

Armstrong Canyon has no quota (and no trail), but you still need a permit for overnight trips starting there. If you take a large group, they might suddenly tell you there's a quota.

Approved bear-resistant containers are required for camping in Kings Canyon National Park, but not in the National Forest in Sawmill Canyon or Armstrong Canyon, but you are still required to protect bears from access to your food, by counterbalancing it or using a bear-resistant container, etc. Check with the rangers in advance to get the current requirements.

Car Camping Nearby

They say it's nice to camp near Scotty Springs on the road between Sawmill pass trailhead and Armstrong Canyon - some info on the road to Armstrong Canyon and camping in the area is given at

See for car camping.

There's a "Sawmill Creek Campground" shown on the USGS Topo where Tinemaha Road (old 395) crosses Sawmill Creek, but I don't recall seeing it as I drove by - I believe it's defunct. The Goodale Creek Campground is listed as the nearest campground by

External Links

Some of my pictures are in my Colosseum Mtn. 2006 album.

See an artificial aerial view of Sawmill Pass and Colosseum Mtn., etc., at

A little kit of information for my trip to Colosseum is at

See also for stuff about the approach through Armstrong Canyon.

California Bighorn Sheep

"The wild sheep ranks highest among the animal mountaineers... Their feeding grounds are among the most beautiful of the wild gardens, bright with wild daisies and gentians and mats of purple bryanthus.… Here they feast all summer, the happy wanderers, perhaps relishing the beauty as well as the taste of the lovely flora on which they feed."

John Muir "The Wild Sheep" 1881

Colosseum Mountain is in a "California Bighorn Sheep Zoological Area", as shown here, but it is not in an area that is closed to hiking at any time.

I have read that "Sierra Nevada Bighorn are rarer than the Florida Panther or the California Condor. They are clearly one of the most endangered mammals of North America."

You can read something about them at, or at .

The US Fish and Wildlife Service "Final Recovery Plan for the Sierra Nevada Bighorn Sheep" of Feb. 13, 2008, is here. They do consider the Bighorns to be seriously endangered, but they make these statements which would be of interest to mountain climbers:

Actions to ameliorate the effects of human/recreational use were not given high priority in this plan because we do not currently consider recreational use, including the activities of dogs, a significant threat to Sierra Nevada bighorn. If information indicating recreational use is having an effect on recovery becomes available, appropriate actions will be recommended.

Although we recognize the potential of recreation to impact bighorn sheep, these impacts seem to be minor. However, the recovery plan calls for continued monitoring of the compatibility between recreational use of bighorn sheep habitat and bighorn sheep recovery

Additions and CorrectionsPost an Addition or Correction

Viewing: 1-5 of 5
Matt Worster

Matt Worster - Jun 6, 2006 12:58 am - Hasn't voted

minor quibble

Right vs. wrong . . . or higher vs. lower? :-)


Langenbacher - Jun 6, 2006 6:07 pm - Hasn't voted

Re: minor quibble

The one with the register vs. the one without the register - that much I'm sure of. And, as the article shows, I'm attempting to determine the higher vs. lower and the named vs. un-named. The "X" on the topo with an elevation would usually make make me think it's the named, highest summit, but this time that doesn't seem to be the case. Regardless, most people want to sign the register so that's what I call the correct summit.

KathyW - Jun 19, 2006 11:39 pm - Voted 10/10

Re: minor quibble

I was just up there and it seems to me that the bump with the register is the higher one. My guess is that it might be 100 feet higher.


bobpickering - Jun 10, 2018 2:32 pm - Hasn't voted


As of August 2017, the Sierra Peaks Section (SPS) recognized the higher, western summit: 12,473'.


Langenbacher - Jun 10, 2018 7:37 pm - Hasn't voted

Re: 12,473

Thanks Bob! That change was made at my request. I forgot to not it on this Summitpost page.

Viewing: 1-5 of 5



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.