Union Pacific 3999 and 5091 travel over Cuesta Pass, north of San Luis Obispo, to help a work train over the steep grade.

A couple extra units sit on the helper spur as the sun begins to set in San Luis Obispo. The two SD70Ms brought the baretables you see to SLO for storage. The units in this shot are UP 8311, 8380,... (more)

The San Luis Obispo based helpers warm up before heading north to Santa Margarita to help a southbound train over Cuesta. Nikon D70, 28-70mm.

The San Luis Obispo Based helpers start up filling the air with the stench of diesel exhaust. This night the helpers are to be used to help push a long northbound MWCPT over Cuesta Grade. Nikon ... (more)

UP 2772, a former SP SD40M-2, one of 6 SD40M-2s that was built out of an ex EL SD45M's. Here it is strung up with two other UP units serving as helpers for San Luis Obispo. Nikon E995

CEFX SD40-2 3157, UP SD40-2 5524 and UP C44-9W 9590 are now heading towards their storage siding until they will be needed for helper service again. Nikon E995

The two helper engines are moving out of their sideing to help push a ballest train. Nikon E995.

SD60M 2292 along with SD40-2 3295 are heading north on helper duty on rather stormy day in SLO. Nikon E995.

Local helper engines are coming off the grade back to the "yard" for storage. Nikon E995