When I bought a ticket to ride the narrow-gauge train from Durango to Silverton last summer, my only concern was nabbing a window seat for views of the San Juan Mountains. Unfortunately, riders on the historic train face more challenges this year. The “Baby Train,” as it is sometimes called, is running again — sort of. Shut down by the coronavirus pandemic in March, the Durango & Silverton Narrow Gauge Railroad (D&SNGRR) was ready to roll again in June when businesses in southwestern Colorado began...