Page Type Page Type: Mountain/Rock
Location Lat/Lon: 40.79620°N / 107.07117°W
Additional Information County: Routt
Activities Activities: Hiking, Mountaineering, Scrambling
Seasons Season: Summer, Fall
Additional Information Elevation: 10149 ft / 3093 m
Sign the Climber's Log


“South Diamond Peak”/Peak 10,149 is located in the Elkhead Mountains of NW Colorado. It is one of the least conspicuous of the 10,000 feet peaks in the Elkhead Mountains because it is surrounded by higher mountains. The peak itself is located on the same ridge as the main Diamond Peak. Although the mountain has a steep Northwest face, the mountain is not that impressive when viewed from afar, but never the less, the upper part of the summit ridge is very interesting with interesting rock pinnacles, summit caves and great views.

Due to its fairly easy access, the peak is climbed somewhat frequently by Elkhead Mountain standards, but the summit register had cracked and was unreadable in 2011 (I packed out the unreadable scraps of paper and broken jar).

Several aspects of the Elkhead Mountains make this a rather unique mountain range in Colorado. It is certainly possible that the Elkhead Mountains are the least known of the major mountain ranges in Colorado. This is partially because the range is a long way from any metropolitan area, and partially because the Elkhead Mountains are fairly low by Colorado standards, as there are no peaks reaching 11,000 feet. There are also few lakes, so the range isn’t visited by fishermen. Despite their low altitude, the Elkhead Mountains receive much snow, and snow lasts into July or later on the higher peaks. Most of the peaks in the Elkhead Mountains see very few ascents, but Hahns Peak, the eastern-most peak in the range is a popular climb for residents of Steamboat Springs. The Bears Ears see quite a few ascents by Elkhead standards, because of their prominent shape and visibility from the Yampa River Valley. Black Mountain is also climbed fairly often because it is the highest point in Moffat County, and the popularity is on the increase with more county highpointing interest. Sand Mountain must be a fairly popular (by Elkhead standards) climb as well, as there is a trail to the top, and as it is the first and only mountain in the range where I have ever met anyone. This was on Labor Day weekend, 2005, when we saw 3 other hikers. Most of the rest of the peaks see few ascents, and one ranger has told me some of the peaks only have a few names in the registers since 1980. So, there are few hikers around, but hunting is another story. The Elkhead Mountains are very popular for hunting in the fall and contain large populations of deer, elk, bear, etc.

One thing unique about the range is that hiker use is overall actually decreasing, rather than increasing as it is in most places in Colorado. The summit registers (which the Forest Service keeps record of) on most peaks indicate that they have had more ascents in the 1960’s and 1970’s than they do now. Even before that, there were many summit logs from the 1930’s and 1940’s from sheepherders.

The Elkhead Mountains are made of old volcanic rocks 17-25 million years old. One thing unusual is that the Elkhead Mountains run west to east as opposed to north and south as most of the ranges run in North America. It is impossible to describe the general forms of the peaks because they are all so different, but most of the peaks are isolated rises from a huge plateau which forms the bulk of the Elkhead Mountains.

South Diamond Peak is the 15th highest ranked peak in the Elkhead Mountains.

Elkhead Mountains-10,000+ Foot Peaks with 300+ feet of Prominence

Northwest FaceThis is the northwest face of South Diamond Peak.

Getting There


From Steamboat Springs, drive to the north end of town and to where County Road 129 leaves Highway 40. A sign marks "Clark" and "Hahns Peak". This is the same road heading to the airport. Drive north on CR 129 for approximately 26 miles. Pass Steamboat Lake and turn left on County Road 62. Drive County Road 62 west and south for about 3.5 miles to FR 42 on the right. Turn right on FR 42 and drive for 0.6 miles to the forest service gate. This gate is locked until July 1st each year. Drive County Road 42 for 1.5 miles to where FR 480 (east loop) takes off to the left. The road here is bumpy, but still passable to 2wd’s if you go slowly. Rather than turning left, continue straight along County Road 42 and follow the bumpy road for another ~4.5 miles (approximate) to a prominent saddle. A rough 4wd track heads north from here for ~0.2 miles so you can drive slightly father, but there isn’t much parking at the end of the track.


From Walnut Street in Hayden, turn north on Walnut, a.k.a. County Road 76, and follow it north for 0.7 miles to County Road 80. Turn right on (gravel) County Road 80 and follow it for 27.3 miles to FR 42. Turn right on FR 42. The first 2.5 miles of FR 2.5 are pretty good, but it quickly turns into a 4wd road after that. The rough section lasts for 1.4 miles and ends at a saddle. This is the best place to park. A rough 4wd track heads north from here for ~0.2 miles so you can drive slightly father, but there isn’t much parking at the end of the track.

SummitThis is the summit of South Diamond Peak.

Navigational Warning


The topo maps available don’t show the roads or trails around this mountain accurately. The closest one that bears resemblance to reality is the Forest Service Map-Routt National Forest, but it is of a small scale. The USGS maps don’t show many of the roads in the areas, but seem to show roads and trails that don’t exist; at least not any more.


The USGS has (finally) updated the 7.5 minute maps. They were scheduled to be produced for Colorado last year, but I’m not sure when they will hit all the stores. Right now you can get/see/print/buy the new 7.5 minute maps on My Topo.

The good news is that all the roads and trails are FINALLY accurate for the Elkhead Mountains (and undoubtedly other areas as well). After receiving the new maps, I am very pleased to see that the roads and trails are in the right places. I am also very pleased that the USGS has a new agreement with the US Forest Service and within the national forest service areas, the private land holdings are shaded (but only in USFS areas, land ownership is not shown outside FS lands) on the 7.5 minute scale maps.

Routes Overview

Southwest Ridge

This is the route we took to climb the peak. It begins at the saddle near spot elevation 9836 and follows the ridge to the summit of South Diamond Peak. The main obstacles are downed timber for the first half of the hike and a steep ascent to gain the summit ridge. Climbing the mountain only takes a few hours, but from the summit you can continue on to Diamond Peak. Please see the route page for a map and details.

Southwest Ridge gentle section of the Southwest Ridge of South Diamond Peak.

Other Routes

South Diamond Peak is rather steep, especially the northwest face, but it be potentially climbed from most directions. A route from the west and FR 481C (closed) might work out, but would have steep sections and probably downed timber.

Red Tape

There is no red tape here (other than the area around California Park is closed to visitation between May 1 and July 1 each year), so make sure to tread lightly.

When to Climb

July through early September could be considered the normal season to climb the mountain. The access roads do not open until July 1 (or later in heavy snow years. The access roads don’t open until July 1, these roads could certainly be walked, snowshoed, or skied before then (the roads are always closed to all travel between May 1 and July 1), though it would be a two day trip for most. A snowmobile would make this a one day climb in the winter. The Elkhead Mountains are a very popular hunting destination in late August, September and October (until snow closes the road), so use extreme caution at this time of year.


There are many informal campsites along the road to the trailheads after you reach the forest boundary, including some nice ones right at the trailhead.

Also in the same general area to the east are the campgrounds at Pearl Lake and Steamboat Lake State Park. These are crowded on summer weekends, and reservations are recommended. Hahns Peak Lake is a Forest Service Campground in the area. All the campgrounds are fee-use areas.

Mountain Conditions


Below is the National Weather Service Climate Summary of Steamboat Springs. The data is from 1908-2005. This is the closest long term weather station, but be aware that higher elevations will be much wetter and colder. Steamboat Springs is at 6695 feet elevation, so expect the temperatures on South Diamond Peak to be 10-20 degrees colder than in Steamboat (except for cold winter nights).

FEB344 59-482.24



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Elkhead MountainsMountains & Rocks