Ascending the Alamo Wagon Road will take you to the Queen Bess Spur, and you can ride Choices back down to the H-Road.
Descending Alamo can be done by driving to the trailhead itself, or by riding Sundowner first.
There are many ways to ride the Alamo. The east trailhead can be accessed directly on the Queen Bess and also from the bottom of Sundowner. The west trailhead can be accessed from New Denver or Three Forks via the Galena. The trail can be ridden as an out and back or as a loop as you can climb up from the west trailhead to both the halfway point on Choices, or to the top of Choices which is also located on the Queen Bess Spur. I rode it as a shuttle, riding Sundowner, Alamo and then the Galena out to New Denver.