The San Juan Express (also known as simply the San Juan) was a narrow gauge train that ran on the Denver & Rio Grande Western Railroad (D&RGW) route from Durango, Colorado via Chama, New Mexico; Cumbres Pass; and Antonito, Colorado to Alamosa, Colorado. The train ran from February 11, 1937 until January 31, 1951 as train numbers 115 and 116, though towards the end of the passenger service it took on the number 215 and 216.