Question: The Medicine Bow Mountains follow the route of the railroad company that operates how many locomotives?

Context paragraphs:
Cameron Pass (Colorado): Cameron Pass is a 10276 ft elevation mountain pass in the Rocky Mountains in north central Colorado in the United States.  The pass is a gap between the south end of the Medicine Bow Mountains and the north end of the Never Summer Mountains.  It sits on the border between Jackson County and Larimer County, approximately 3 mi (5 km) north of the boundary of Rocky Mountain National Park.  The pass provides the most convenient route between Fort Collins and Walden in North Park, using State Highway 14.

Medicine Bow Mountains: The Medicine Bow Mountains are a mountain range in the Rocky Mountains that extend for 100 mi from northern Colorado into southern Wyoming.  The northern extent of this range is the sub-range the Snowy Range.  From the northern end of Colorado's Never Summer Mountains, the Medicine Bow mountains extend north from Cameron Pass along the border between Larimer and Jackson counties in Colorado and northward into south central Wyoming.  In Wyoming, the range sits west of Laramie, in Albany and Carbon counties to the route of the Union Pacific Railroad and U.S. Interstate 80.  The mountains often serve as a symbol for the city of Laramie.  The range is home to Snowy Range Ski Area.

Union Pacific Railroad: The Union Pacific Railroad (or Union Pacific Railroad Company and simply Union Pacific) is a freight hauling railroad that operates 8,500 locomotives over 32,100 route-miles in 23 states west of Chicago and New Orleans.  The Union Pacific Railroad system is the largest in the United States and it is one of the world's largest transportation companies.  The Union Pacific Railroad is the principal operating company of the Union Pacific Corporation (); both are headquartered in Omaha, Nebraska.

Ribbon forest: Ribbon forest is a unique habitat type found near tree line in the subalpine zone of the Rocky Mountains.  It is made up of bands of subalpine forest and meadow that are created when deep snow and wind forces trees to grow only in bands, about twenty feet wide and thirty feet apart, that have enough shelter.  Areas that have this habitat type include the southern Mount Zirkel Wilderness and the Medicine Bow Mountains.  Not surprisingly, these areas get some of the Southern Rockies' largest amounts of snow.  The area between Mad Creek and Buffalo Pass in the southern Park Range has Colorado's highest amount of snowfall, averaging 25 to 30 feet per winter.

Wyoming Highway 130: Wyoming Highway 130 is known locally as the Snowy Range Road.  It makes its way west from Laramie across the plains, and rises over the Medicine Bow Mountains.  The road then turns north through the town of Saratoga, and ends at Interstate 80.  The stretch of road over the mountains is a National Forest Byway.  WYO 130 over Snowy Range Pass is closed during winter (November–May)

Little Medicine Bow River: The Little Medicine Bow River is a 66 mi tributary of the Medicine Bow River in Wyoming.  The basin of the Little Medicine Bow includes the northern slopes of the Shirley Mountains as well Shirley Basin.  The Little Medicine Bow reaches its confluence with the Medicine Bow River 6 mi northwest of the town of Medicine Bow.

Clark Peak (Medicine Bow Mountains): Clark Peak is the highest summit of the Medicine Bow Mountains range of the Rocky Mountains of North America.  The prominent 12960 ft peak is located in the Rawah Wilderness of Routt National Forest, 10.1 km north-northwest (bearing 342°) of Cameron Pass, Colorado, United States, on the drainage divide between Jackson and Larimer counties.  Clark Peak is the highest point of Jackson County and the entire drainage basin of the North Platte River.

Medicine Bow Peak: Medicine Bow Peak is the highest peak in the Snowy Range, a part of the Medicine Bow Mountains, about 35 miles west of Laramie, Wyoming.  It lies within Medicine Bow National Forest and is the highest point in southern Wyoming.  The summit lies in extreme western Albany County, but the mountain's lower reaches stretch westward into eastern Carbon County.  The summit is more than 12,013 feet (3,661 m) high and is visible from Snowy Range Pass, elevation 10,847 ft (3,300 m), on Wyoming Highway 130, a Wyoming Scenic Byway.  The most commonly used trail to the peak is a four-mile hike featuring switch-backs and a great deal of loose rock.  The trails to the peak are usually open from early June to mid October.

Virginian Hotel (Medicine Bow, Wyoming): The Virginian Hotel is a historic hotel in Medicine Bow, Wyoming, United States.  Construction on the hotel began in 1901 and was completed in 1911.  It was built by August Grimm, the first mayor of Medicine Bow, and his partner George Plummer.  The hotel is thought to be named for the famous novel written in Medicine Bow, "The Virginian" by Owen Wister.  Although it provided a place for cowboys and railroad workers to stay while they were in town, the hotel was actually built to serve a much broader clientele.  It became a headquarters for all to meet and eat as well as a setting for many business dealings.

Rock Creek (Medicine Bow River): Rock Creek is a 125 mi river in the south central part of the U.S. state of Wyoming.  It empties into the Medicine Bow River.  The drainage basin of Rock Creek starts high on the north side of the Snowy Range.  At the northern base of the range, Rock Creek runs through the town of Arlington and continues on through McFadden and Rock River.  From there Rock Creek runs primarily northeasterly before turning to the northwest and meeting with the Medicine Bow River just north of the town of Medicine Bow.

Supporting paragraphs: Medicine Bow Mountains Union Pacific Railroad
Answer: 8,500