Two D&RGW narrow gauge K-27 mikados, numbers 455 and 461 were sold to the Rio
Grande Southern. No. 455 was aquired by the RGS in early 1940s and no. 461 at
about 1949. Both locomotives were scapped with the abandonment of the RGS in
1952.
| Class | Qty | Numbers | Year Built | Builder | Notes | Survivors |
| K-27 | 15 | 450 - 464 | 1903 | Baldwin | Narrow gauge, 458 & 459 to National Railways of Mexico (400 & 401), Sold to Gene Autrey 5/1955 | 463 @ Cumbres & Toltec, 464 @ Huckleberry Railroad, Flint, MI |
| K-28 | 10 | 470 - 479 | 1923 | ALCO | Narrow gauge, 471, 472, 474, 475, 477, 479 to WP&Y (250-256) 10/1942 | 473, 476, 478 @ Durango & Silverton (3/1981) |
| K-36 | 10 | 480 - 489 | 1925 | Baldwin | Narrow gauge | 483, 484, 487, 488, 489 @ Cumbres & Toltec, 480, 481, 482,& 486 @ Durango & Silverton |
| K-37 | 10 | 490 - 499 | 1928 & 1930 | D&RGW Burnham Shops | Narrow gauge (rebuilt from standard gauge consolidations) | 491 @ CO Railroad Museum, 492, 494, 495, 497 @ Cumbres & Toltec, 493 @ Freight House Museum, Silverton, 498 @ Durango & Silverton, 499 & Royal Gorge Park, Canon City |
| K-59 | 14 | 1200 - 1213 | 1924 | Baldwin | Standard gauge | |
| K-63 | 8 | 1220 - 1227 | 1947 | Lima | Standard gauge, from D&SL in 1947 (Ex-D&SL 400-409) | |
| K-63 | 2 | 1228 - 1229 | 1947 | ALCO | Standard gauge, from D&SL in 1947 (Ex-D&SL 400-409) | |