The PV&WRR has many passenger trains that operate on it's lines. Here we see trains from the PV&WRR (on Track 1), Union Pacific (on Track 2) & Santa Fe (on the passing siding) dropping passengers off at the PV&WRR's Union Station. Other railroads also sporadically run trains to Union Station.
In the 1950's, Denver's Union Station saw dozens & dozens of trains. Today, not counting the RTD's Light Rail Operations, Denver Union Station sees between two and four trains a day (Amtrak's California Zephyr & the Ski Train).