RTD commuter train 4026 (Hyundai Eagle P3) runs on the elevated section of track past the UP's North Yard at dawn.

RTD Commuter Train 4026 (Hyundai Eagle P3) runs past a dynamic sunrise as it heads towards Arvada, Colorado.

RTD commuter train 4026 (Eagle P3) passes by the old water tower next to the Union Pacific's North Yard in Denver, Colorado.

Dawn is beginning to break as RTD 4026 (HyundaiP3 Eagle) runs over the elevated section of the commuter rail line that spans the Union Pacific's North Yard in Denver, Colorado.

"RTD Over Sand Creek" A RTD A Line commuter train flies over Sand Creek while on it's way to Denver International Airport.

Yet another spectacular sunrise greets the riders of Denver RTD's commuter rail.

RTD Commuter train 4026 heads to Denver International Airport.

RTD Commuter train 4026 arrives at Denver Union Station from Denver International Airport, while red signals hold outbound cars.

An RTD heavy-rail train departs from Denver International Airport.