Note: We climbed this summit as part of a three peak day that began with Three Needles, continued to T.11 and then finished with this summit. Total mileage and elevation gain reflect that overall trip which comes to 4,075 feet of gain and 12.5 miles. Mileage from T.11 is only about 1.75 with a mere 475 feet of elevation gain. But a start from Red Mountain Pass and including the other two summits makes this a long day. Some alternate starting points will be discussed later.
From the car park described in the trailhead description for Red Mountain Pass, walk or drive to Porphyry basin as described for Three Needles Peak. Use either FR823 or FR822 or a combination of both to access the area. Climb Three Needles as described, then traverse over to T.11 as described for that summit. Our route description for UN13,159 begins from the summit of T.11.
From T.11, the hike over to UN13,159 will take you through some of the most delightful high alpine area you'll ever have the pleasure of strolling through. Head SSW from the summit following the easy-sloping ridge down to the saddle that separates Bridal Veil Basin from Mill Creek Basin. Drop into the Mill Creek Basin and head toward Columbine Lake, a little over one half mile away, strolling through tundra interspersed with protruding granite boulders and outcrops. Pause at the lake and if it's a hot day, cool your feet or your entire body with a quick dip. The unique turquoise/blue color of the lake along with the rugged, multi-hued rocks of the Lookout Peak complex offers a color palette no photographer can resist. Alpine flowers abound.
From Columbine Lake, hike ESE to a flower-strewn saddle between UN13,159 and the unranked Pt.13,300. A magnificent view of the Grenadier Range opens up here. Then hike east along the easy-going ridge to the summit. The last portion will become rocky but not difficult. Soak in the outstanding view and solitude from this seldom-visited summit.
For your return to the start, we dropped back along the west ridge back to the same saddle and then headed north into Mill Creek Basin, crossing the stream where the two main forks come together. There's a nice waterfall here and a prolific display of wildflowers. Continue north and gradually more eastward through a minor cliff band to a higher bench area below the spectacular rock buttress that protrudes off Pt.13434. Veer east on mostly tundra to contour around the buttress. As you come around onto the north side of the buttress, descend some through rock and tundra to a rock glacier area. If you're fortunate, you may be able to spot an old trail that cuts through the rock debris. That trail will fade in the tundra afterwards as you continue contouring N and E through the basin. You may be able to pick up the same trail again as it heads uphill across a barren slope and crosses onto another bench at about 12,800 ft. Walk east and contour again around yet another prominent buttress that protrudes off Pt.13,375. There's another particularly nice, flower-laden slope here. The cliffs and spires of the buttress make a great background for the delicate flowers. Once you round the ridge, the descent back to Porphyry Basin is easy and you can pick up the trail near Bullion King Lake to hike on back to your vehicle. Time to climb all three peaks and return was 7 hours.
Alternate approaches to UN13,159: If you just want to climb UN13,159 alone, there are at least two possible ways to access this summit: 1. Take the Ophir Pass road (FR 679) from US550 and drive about 2.7 miles to where the USGS map shows an old 4WD track heads NW up into an isolated basin and an unnamed, small lake below the south face of UN13,159. Gain the saddle between UN13,159 and the unranked Pt.13,300 and follow the west ridge to the summit. 2. About one mile below the old townsite of Chattanooga along US550, there's an old mining road that goes up to the Imogene Mine. A trail heads west from the vicinity of the mine and climbs steeply into an isolated basin directly east of the UN13,159 summit. The same trail delivers you into the head of Mill Creek Basin. This trail still shows on the San Juan NF map and is called by some, the "Columbine Lake trail."