A typical Burlington Northern grain train of the 1990s climbs Mullan Pass west of Helena, Montana, with a roar that can’t be repeated today. BN GE C30-7 No. 5022 leads a sister C30-7 and two EMD SD40-2s on the head end, while a four-unit mid-train helper is passing milepost 13, and a rear four-unit helper set is five cars from the road crossing at West Austin. During this time, Montana Rail Link helper sets are made up of a mixture of SD40, SD45 and SD45-2 units. The train fills the valley with the sound of working locomotives as it negotiates multiple curves on August 28, 1993.