Train service in Thornton is available through a commuter rail line that connects the city to the Denver metro area. The train service operates on a regular schedule, offering a convenient option for reaching destinations in and around Denver. While the rail line provides reliable transportation, it primarily focuses on connecting Thornton to larger hubs rather than offering multiple routes within the city itself. The infrastructure includes park-and-ride facilities, making it easier for residents to access the train. However, for local travel within Thornton, other transportation options may be more practical.