Add a new Trip to your Log from TRX Trailhead by clicking "Add Trip Folder".
To Add items to your Trip:
1. Search for an item(track/trail/waypoint) in the basemap.
2. Click and hold on the Marker Label.
3. Drag the Marker Label to the Trip folder and release your click.
4. The item is added to the Trip Folder. Repeat for each item you want in your Trip.
5. You can see the Trip in your device Log after you sync your account.