Note: Mileage provided and elevation gain assumes walking from Red Mountain Pass.
From the car park at Red Mountain Pass, either drive in 4WD or walk appx. 3 miles to the summit of Black Bear Pass road (FR823). If walking, you'll probably want to avoid the road traffic by heading more directly up into Mineral Basin. There will be two steep pitches with an intervening bench. Most of the hiking will be on tundra. At the pass, make a decision whether or not to climb Trico Peak (easy Class 2 tundra walk up the south ridge). But be warned that to descend the first 400 feet of the north ridge of Trico involves some somewhat exposed 3rd class work. On LoJ, "Furthermore" describes this section as "the rock appearing super sketchy but surprisingly somewhat solid." If you wish to avoid that problem, then continue walking/driving on the Black Bear Pass road as it begins to descend toward Telluride for about one half mile. If in a vehicle, park at about 12,600 foot elevation where a older mining road heads off to the right. This badly deteriorated road will lead through a rocky, rubble section on the west side of Trico and continue up to a saddle just south of Pt.12,938. The road continues north to another saddle and then you have an easy half mile and 600 feet of gain to the UN13,510 summit on mostly tundra, gravel and small scree. Enjoy the amazing view. On the day we climbed this, it was cloudy, cold, and breezy with threatening precip and we could hardly see where we were going. That is in part what prompted not negotiating the north ridge of Trico.
Return as you came or consider traversing to Telluride Peak, less than a mile north. Telluride peak is considered a "soft rank" summit, being perhaps only 11 feet short to qualify as a separate 13er.
Alternate approach: From the same car park on Red Mountain Pass, you can pick up an old trail that heads NW into the unnamed basin SE of the UN13,510 summit. This trail does not show on the Uncompahgre NF map but does show on the San Juan NF and also shows on the Ironton USGS quad. One branch of the trail leads to the saddle south of UN13,510. Another branch leads north toward Ptarmigan Lake. This approach would avoid the traffic along Black Bear Pass road, but would be all on foot.