Mainline is a 2.43-km cross-country ski trail within the Morice Mountain Nordic Ski Club Trail Network. It provides a gentle route through the forested landscape of Morice Mountain and serves as a key connection to the Go Big or Go Home Junction. From this junction, skiers can choose several routes, including Moose Meadows, I am Groot, Trespass, and Sawdust Loop. Mainline is also described by the club as one of the gentler ways to reach the junction, making it a useful option for skiers looking for a less challenging approach.