CPR Alyth Yard is a 168acre Class 1 railway facility in the neighbourhood of Alyth, southeast of downtown Calgary, Alberta. One of Canadian Pacific Railway's main marshalling yards in Canada, it primarily serves as a hump classification yard and in addition has rail car repair shops and diesel locomotive servicing facilities on site.
The yard is CPR's busiest in Western Canada and is home terminal to crews operating north to Red Deer, Alberta, and west to Field, British Columbia, through the Spiral Tunnels.
At the centre of Alyth is a 48-track hump classification yard. This is an automatic hump using the Pro Yard II operating system for the hump computer. Cars humped are weighed and then allowed to run down into one of the many classification tracks, slowed by automatic retarders controlled by the hump computer.
Alyth Yard is designed to handle approximately 2200 rail cars at 100% capacity, and is supported by satellite yards in Ogden Park, the Industrial Yard Office (IYO) and the Calgary Intermodal Facility at Sheppard.