This trailhead would be primarily used for access to Trinchera and Cuatro summits. From Walsenburg, drive west on US 160 and take the turnoff for La Veta, on SH12. Drive through the quaint, small town and continue south toward Cucharas Pass. This very pleasant road takes you through gambel oak terrain, into ponderosa forest and eventually more typical higher elevation aspen and conifers. If you do road bicycling, this is a great ride! Drive on through the little townsite of Cuchara, past the turnoff for the old Cuchara Valley Ski area and just ubder 2 miles before reaching the summit of Cucharas Pass, turn west (right) onto FR422 and drive the steep, graded dirt road to the Blue Lakes Campground. At the 4-way intersection where you can turn down into the campground, turn left onto FR436. Drive a few yards and find a place to park if in a passenger car. Or, you might inquire with the campground host to see if there's a better parking option.
From Alamosa, drive east on US160 through Ft. Garland and over La Veta Pass. About 15 miles east of the pass, watch for the SH12 turnoff to the town of La Veta. Follow the directions as above.
For another longer but possible access to Trinchera & Cuatro, see the trailhead titled "Mt. Maxwell Trailhead." This access could also be used to reach summits like Mariquita and De Anza B.
There are two designated, Forest Service campgrounds; the Blue Lakes and the Bear Lake, just a few miles beyond Blue Lakes. Both are accessible by passenger cars. Just a short distance up FR436 from the Blue Lakes CG, there may be a couple of primitive spots if the FS has not closed them. Further up FS436, if you have 4WD, there are more primitive sites.