Sherman Hill on TrainzItalia. I doubt the MK-Specials where assigned to the Sherman Hill division but it’s a decent enough route to run them on.
My screenie was from there too.
FYI in 1950 #2480 was in storage at Laramie, #2482 was in the shop at Laramie, and #2483 was in storage at Cheyenne.
So it is likely that at least three were working in the Sherman Hill area in the 20s, 30s, and 40s.
1950 deployment of UP MK-Specials
2480 Wyoming - Stored Laramie
2481 Kansas - Denver-Ellis Pool
2482 Wyoming - In Shop Laramie
2483 Wyoming - Stored Cheyenne
2484 Kansas - Denver Mines Runs
2485 Kansas - Stored La Salle
2486 Kansas - Denver Shop
2487 Kansas - Denver-North Platte Pool
2488 Kansas - Laid Aside Denver
2489 Kansas - Denver-Ellis Pool
2490 Kansas - Switcher Denver
2491 Kansas - Denver-Ellis Pool
2492 Kansas - Sterling-Julesberg Local
2493 Kansas - Denver Mines Runs
2494 Kansas - Laid Aside Denver
2495 Kansas - Laid Aside Denver
2496 Kansas - In Shop Denver
2497 Kansas - Denver-Ellis Pool
2498 Kansas - Denver-Ellis Pool
2499 Kansas - Denver-Ellis Pool
Source UtahRails.net
Edit: I was puzzled by the apparent conflict between UtahRails info on these locomotives and Steve's info.
Turns out that UP purchased their MK Spls in Sept 1918 build #s 59518-59537 and OSL purchased their MK Spls (OSL 2535-2554) in Dec 1918-Jan 1919 build #s 60235-60344. The UP locos were originally numbered 2295-2314 and renumbered to 2480-2499 in 1920. (Source UtahRails.net)
So now you can release a new OSL locomotive Steve.