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| Freight interline partnership | |
| Industry | Transportation | 
| Area served | United States | 
| Products | 53 foot containers | 
| Services | Intermodal freight transportation Logistics | 
| Parent | Union Pacific & CSX | 
| Website | https://www.up.com/customers/intermodal/umax/index.htm | 
UMAX is a domestic interline intermodal freight transport program that provides shipping and logistics of containers. The program is a partnership; its parent companies are Union Pacific Railroad and CSX.
Launched March 29, 2010, UMAX has a fleet of over 20,000 domestic 53 ft (16 m) containers. The service traverses major cities throughout the United States.