The Shirley Mountains are a minor central Wyoming range[tops = 9153] that bounds the southwest side of Shirley Basin. The Shirley Mountains are about 29 miles north west of Medicine Bow, WY. The escarpment/fault faces the Shirley Basin in an "L" shape fashion with the base's east end running west and then turning north. The granite core is the red wall facing east. Among those formations topping the visible granite is a limestone wall above 8000 feet. Along the east west escarpment are some mounds, towers pinnacle and walls with steep faces.
Mt Bikers: There are many 2-tract roads on this flat top that make loops and have cool temps and not to difficult for casual mountain biking. Consult the Google map of this region in high detail to see the many 2-track options.
Cavers: There is also a limestone cave out this way. Consult with Rawlins BLM office for key to access.
See MAP 1: Take WY 487 north of Medicine Bow, WY for 21.5 miles to jct WY 77 [the old paved road] and go west 9.2 miles to jct 102 and go west on a gravel road. Drive 2.3 miles taking a right to stay on Rd 102. After 6.3 miles go straight [west] at jct 103 staying on Rd 102. Drive 1 mile and take a Rd 3115 south passing a campground. After going uphill and continuing on the flat for 3 1/4 mile you may be able to spot point 8172 to your left. Map 2 covers in more detail the region south and east of here. If you are hiking to the Red Granite Blocks that face east start hiking here, otherwise proceed along Rd 3115 to the rocks facing north. Don't miss the pasley painted abandoned hippy school bus further south on Rd 3115[free camping if still here].