Lidar values now complete.

UN 13,015 (formerly UN 13,020 interpolated) near Maroon Lake and Willow Pass has been determined to be no longer a ranked summit per Lidar evaluation, which gives it 292 ft. of prominence. This has reduced the total number of ranked 13ers from 584 to 583. We will be adjusting our list in the near future.


LoJ: #596 (Pre-LiDAR #604) / 13,064' "Chalk Rock Mountain" Formerly UN 13,055

Range › Sawatch Range
Quadrangle › Tincup
Summit Location › Peak Route Icon N 38° 46' 45.21, W 106° 24' 49.41" (Not Field Checked)

Peak Summary

Chalk Rock Mountain (13,064) is sequenced with Mount Kreutzer and an unnamed 12er for a Class 2 day hike above Tincup, CO and the beautiful Mirror Lake. The trailhead is accessible by passenger vehicles of most types over graded gravel roads, however the short three-mile stretch of rocky road from Tincup to the trailhead may lead to preferring something with a little better ground clearance. This combination makes an easy day hike that can get you back to your vehicle by early to mid-afternoon. The nearby Mirror Lake is a beautiful and scenic mountain lake that's worth the side trip. Lidar added 9 feet of elevation to this summit changing it from 13,055 ft. to 13,064 ft.

Chalk Rock Mtn. South Ridge Route

Class 2
Peak Icon Peak Icon
Medium Day // Take a Lunch
Climbed with Mount Kreutzer
RT From Garden Basin Trailhead: 8.15 mi / 3,425'
From Mount Kreutzer: 1.90 mi / 595' (One-Way)
  • Trailhead
    • Garden Basin Trailhead

      From Gunnison, drive north on CO135 to Almont. Turn right (east) onto CR742 for Taylor Park Reservoir. The road winds up canyon for what seems like a long time (about 20 miles) to the reservoir. Along the way, it passes several Forest Service campgrounds, none of which are very large. In order from Almont, these are: Taylor Canyon, One Mile, North Bank and Rosy Lane - all within a couple miles of each other, followed by Lodgepole, Cold Spring, Lottis Creek and Lake View on the south side of the reservoir.

      At the SE end of the reservoir where there's a couple stores and a number of cabins, veer right onto FR765 for Tincup. The road changes from paved to good quality gravel all the way into Tincup. In the middle of town, turn left (east) onto FR 267. The road becomes rockier and dusty from traffic, but when we last visited, most passenger cars could make it to the Mirror Lake area. At 3 miles from Tincup, there's a turnout on the left (north) side of the road. A short road loops through this turnout and there's a toilet there. This is the trailhead parking.

      An alternate route that may prove a little shorter if coming from Monarch Pass toward Gunnison: Turn north from US50 at the little town of Parlin which is about 11miles east of Gunnison onto CR76. Follow this paved road NE to the little village of Ohio and continue on to Pitkin. The road turns to graded gravel here and remains in that condition as it continues north past the Quartz Creek CG and switchbacks to climb to the top of Cumberland Pass. On the north side of the pass, the road drops down on a series of switchbacks to the valley bottom and continues into Tincup. Once in Tincup, follow the directions above.


      The closest camping to the trailhead is the small campground at Mirror Lake. The campground is about a half mile past the trailhead, continuing to Mirror Lake or 3.5 miles from Tincup. The last few yards up the road are steeper and rougher. There are ten sites here that cost $12 per day and there is one vault toilet and no water supply. The lake is within a short walk (under 5 minutes) of the campsites. This is a very popular area, especially on summer weekends, so don't plan on the first-come-first-served campsites being available. But, we would add that the year we visited here was over the 4th of July weekend and were very surprised to find two site open. We grabbed one and enjoyed a splendid evening. The only drawback was the myriad mosquitoes one may typically encounter this time of year around a large body of water.

      For other national Forest campgrounds, see the list above in the driving directions. There is all kinds of at-large camping north of Taylor Park Reservoir.

      Campsite Locations

      Mirror Lake › N 38° 44' 51.60, W 106° 25' 54.83"
      11,000 ft. elevation
    Approach Map Photos
    • From Mount Kreutzer

      The Garden Basin Trail is also a part of the Continental Divide Trail. That trail is labelled as #414 on the FS map, but the original old road that starts up into this basin is 267.1AB. From the parking area follow the trail NW, which is really more of an ATV track, up for a mile to the creek crossing in Garden Basin. This is only about ¾ mile and 500 feet in elevation gain. Instead of crossing the creek, which would have required a brief wade, we decided to turn east and head up along the south side of the creek towards the upper basin. Initially, we hiked through forest with downed timber, but after a while, we broke out into a clearing and the bottom of a rubble pile. Instead of heading directly up the basin and the west face of Kreutzer, we elected to ascend SE, up through boulders and rubble to the west ridge of the peak intersecting it at about 12,200 ft. Once on this prominent ridge, enjoy a spectacular view of Mirror Lake far below and the valley of east Willow Creek that leads to Tincup Pass. You may intersect a cairn-marked trail coming up out of the forest below on the south face of the ridge, so perhaps there is an access from closer to the lake, but from the Mirror Lake CG, a hike up the south face of this west ridge looked dauntingly steep.

      Once on the west ridge, continue hiking along the broad slope walking on mostly broken, medium-sized rubble with some intermittent tundra. The faint trail that had come from the south side of the ridge provided some guidance. Another 900 feet of gain will deliver you to the rocky summit area with a cairn. It took us about 2:20 from the trailhead. From this summit, there's a good view of Emma Burr to the south and Jones Mtn. to the NE. If you have not climbed Jones, you may want to consider heading over to it next, but this would require a 1,200 foot loss in elevation which you would have to regain and also finding passage through low to medium height willows in the upper Mineral Basin. We elected not to do this and continued north from here to Chalk Rock Mtn.

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    Peak Icon Route Map Photos

    Route Info Chalk Rock Mtn. South Ridge

    Route Description

    Year Climbed: 2011

    Chalk Rock Mtn. is sequenced with Mount Kreutzer and our route description also takes you over an unnamed 12er. One-way mileage and elevation to Chalk Rock are measured from the summit of Mt. Kreutzer. Round-trip mileage and elevation gain assume completion of the sequence which includes the unnamed 12er.

    The hike over to Chalk Rock is a pleasant stroll over mostly tundra with some embedded rocks and another rubbly summit. There are several small ups and downs to deal with, but the expansive views in every direction keeps your attention diverted to the views rather than the inconvenience of the extra elevation gains. Snowbanks on the leeward side of the ridge offer some brilliant contrast to the greening tundra. Summer flowers may be beginning beginning to emerge in June/July. From the summit of Kreutzer, Emma Burr Mountain looms above to the south. As you walk along the ridge to the north, you may also gaze down into Sanford Basin on the west side. We had hoped to spot some elk down in that remote location, but never saw any.

    As mentioned before, the walk is on mostly tundra, with the final approach to the summit of Chalk Rock giving way to rocky rubble. Along the way over, we crossed an interesting area of exposed gneiss with large quantities of quartz laying on the ground. You can easily see Cottonwood Pass to the north. Once on the summit of Chalk Rock Mtn., a somewhat dramatic ridge extends east over to Jones. This ridge drops steadily and becomes seriously narrow with a cliff on the north side. It might make an interesting hike over but threatening weather advised us not to attempt.

    The descent we utilized included tagging the summit of an unnamed but ranked 12er west of the ridge that connects Kreutzer & Chalk Rock. From the summit of Chalk Route, walk back to the south along the ridge for 1.1mile until you reach the intersection with the ridge that extends over to UN12,730. Hike west along the ridge crest losing about 600 feet in elevation on the easy ridge walk. Continue following the same ridge west as it curves upward and turns more NW. The total traverse is about .7 mile and you'll need to regain about 400 feet in elevation to reach the 12er summit from the saddle. If you don't want to go to the summit of the 12er, it's an easy descent from the saddle straight back down into Garden Basin with some willows to contend with which can be avoided by skirting them on the edge of the forest on either side.

    Or, from the summit of UN 12,730, it's easy to descend south straight down and intersect the Continental Divide trail which will take you back to the creek crossing (managed to do this without removing boots) and then follow the Garden Basin trail back out to the trailhead. There are really any number of ways to get down.

    Additional BETA

    Links to other information, routes & trip reports for this peak that may be helpful.
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