A couple Tier 4 GEVOs assist a Stockton to Barstow manifest upgrade as they near Marcel.

After meeting Z-WSPNBY, the DPUs on H-STOBAR proceed towards Marcel.

The rear of H-STOBAR loops around itself at Tehachapi.

DPUs on an H-STOBAR approach Tehachapi Loop.

The head end on a Stockton to Barstow manifest crosses over itself as they work upgrade towards the summit at Tehachapi.

H-STOBAR wraps around Tehachapi Loop.

The head end of a Stockton to Barstow manifest approaches the tunnel at Walong.

H-STOBAR approaches Tehachapi Loop.

The front, middle and rear portions of a lengthy H-STOBAR manifest can be seen traversing Tehachapi Loop, putting on quite a show in the process.