Locomotives built by Montreal Locomotive Works featuring Alco designs are still operating on short line Western New York & Pennsylvania.
Officials expect the six-axle units to operate through the end of summer before being replaced by GE-built wide cab locomotives.
The six-unit operable fleet of C636s and one C630 operate on former Pennsylvania Railroad tracks between Machias, New York, and Driftwood, Pennsylvania.
On occasion, the units will head west on former Erie Railroad track to Salamanca, New York, or Meadville, Pennsylvania.
A report posted on the Trains magazine website said the best opportunity to see the MLW units in action is to wait on a public road (Constitution Avenue) for the Driftwood turn, which operates as needed but as many as three times a week from Olean, New York.
A Fairfield Inn is located next to the tracks a short distance away.
Westbound trains go to either Salamanca or Falconer, New York, to meet the Meadville turn.
The Trains author recommended being there by 7 a.m. He also noted that the WNY&P is not as railfan friendly as it once was so be aware and respectful.
The GE units are expected to arrive on the WNY&P this month, but the MLW units will be stored serviceable even after the GEs have taken over assignments now held by MLW locomotives.