Montana Rail Link manned helpers assist a westbound BNSF coal train across Mullan Pass as they cross Greenhorn Trestle on MRL's 3rd Sub.
Eastbound, on the west slope of Mullan Pass. Third unit is MRL 8921.
The hardest part of the pass is behind. Helena and a crew change lay ahead.
Grain train has crested the summit of Mullan Pass and begun the descent into Helena.
Just starting to drop down the grade into Helena, the power is over the top but the bulk of the train is still in the Mullan Tunnel and on the uphill side of the pass.
Missoula to Laurel local heads east across former Northern Pacific built trestle.
