I'm sure it's TRAIL. I believe it refers to an old World War I song, "There's a long, long trail", sung by John McCormack among many others.
"There's a long, long trail a-winding
Into the land of my dreams,
Where the nightingales are singing
And a white moon beams.
There's a long, long night of waiting
Until my dreams all come true;
Till the day when I'll be going down
That long, long trail with you."