Page Type Page Type: Mountain/Rock
Location Lat/Lon: 38.14596°N / 107.46743°W
Additional Information County: Hinsdale
Activities Activities: Hiking
Seasons Season: Spring, Summer, Fall, Winter
Additional Information Elevation: 13100 ft / 3993 m
Sign the Climber's Log


Unnamed 13100 B is a low 13er located in the northern San Juan range of Colorado Mountains. Colorado has so many 13ers (mountains above 13,000 feet = 3962 meters) that many remained unnamed. B means there are 2 unnamed mountains of this height. It is a ranked peak. 
UN 13100 combines really nicely with Sheep Mountain C

Sheep Mountain C and UN 13100 B
Sheep Mountain C (on the right) and UN 13100 B (on the left)

Colorado Rank: 569

Saddle: 12,620 feet

Parent Lineage: Line Parent: Unnamed 13681 Proximate Parent: Sheep Mountain 

Wilderness: Uncompahgre

Class: 2

Nearby Mountains

Getting There

The Little Cimarron Trail # 229 begins at the Alpine-Little Cimarron Trailhead on Forest Service Road 864. 

From Montrose travel approximately 21 miles on US highway 50 east (towards Gunnison) to the intersection with County Road 864 = Little Cimarron Road. This road is well marked, nicely graded and easily passable by low clearance vehicles. Turn south on CR 864 and continue approximately 16 miles to the Trailhead. There is parking for about 2-3 cars and the trailhead is marked as East Cimarron Trail. Elevation at the trailhead is about 9,720 feet.


Cabin below 13100
Cabin below 13100
East side of UN 13100
East side of UN 13100

Route starts on a nice Little Cimarron Trail # 229. Follow this trail as it climbs gently up through forested area with many meadows. Cross the Little Cimarron river (there is no bridge, I took my shoes off and waded through since the water was high, little above my knees). At approximately 2 miles you enter Uncompahgre Wilderness (sign). The trail continues south through meadows and dense timber, there are some fallen trees on the trail, but those are easy to negotiate. The trail is easy to follow. You will soon get a nice view of a long ridge of Sheep Mountain. You walk through a deep valley and on your right (west) side will be Sheep Mountain. I continued on this trail for about 5.2 miles and where the trail made a sharp turn left and across the river, I started bushwhacking up the slopes towards the saddle between Sheep Mountain C and Unnamed 13100 peak. It was not very steep, or hard. I ended up farther south than I expected, more below Unnamed 13100, so I decided to ascend first the south - southeast slopes of 13100, descend on its north ridge and then onto Sheep Mountain's south ridge. 
There is an old cabin below UN 13100. I stopped there to explore a little bit (could be an ok place to bivouac in the future). Once above timberline and had both UN 13100 and Sheep mountain in a view, the route finding was easy and obvious. It is nice that this route does avoid scree - you walk on a trail, through a forest, and on grassy slopes. 

There was a small cairn on the summit. No summit register. The views were spectacular.

Silver Mountain and Uncompahgre
Silver Mountain and Uncompahgre from south ridge of UN 13100

Uncompahgre 14er
Uncompahgre 14er

Coxcomb, Redcliff and Fortress
Coxcomb, Redcliff and Fortress

13100 B summit
13100 B summit

Dunsinane Mountain
Dunsinane Mountain

Sheep Mountain C
Sheep Mountain C

Red Tape

Pink wildflowers
Pink wildflowers
Most of the Cimarron trail is within Uncompahgre Wilderness and wilderness regulations apply here. 
Uncompahgre Wilderness was designated in 1980. The name comes from a Ute Indian word with one of the translations being "dirty water". There are two fourteeners and at least twenty five 13,000 foot peaks.
Wilderness rules apply here: ALL VISITORS PROHIBITIONS:

1. Entering or being in the restricted area with more than 15 people per group, with a maximum combination of people and 
stock not to exceed 25 per group.
2. Camping within one hundred (100) feet of any lake, stream, or National Forest System Trail. 
3. Building, maintaining or using a fire, campfire, or wood-burning stove fire:
a) within one hundred (100) feet of any lake, stream or National Forest System Trail.
b) above treeline. 
4. Storing equipment, personal property, or supplies for longer than seven (7) days. 
5.Hitching, tethering, hobbling or otherwise confining a horse or other saddle or pack animal: 1) in violation of posted instructions, or 2) within 100 feet of all lakes, streams, and National Forest System Trails. 
6. Possessing a dog which is not under control, or which is disturbing or damaging wildlife, people, or property. 
Note: the term "under control" is defined as the dog being leashed, and/or under direct verbal control by the 
dogs owner or handler at all times. 
7. Shortcutting a switchback in a trail. 

When to Climb

Best is June through October, early May will still have too much snow. 
If traveling in winter, always check avalanche conditions and be prepared to spend the night out. 


There is a campground near the trailhead (about 2 miles before you come to the trailhead). There is also enough place at the parking lot that one may spend a night in the car there. Back packing camping is available along Little Cimarron Trail. Just follow the Wilderness rules. 

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