Zombies! Run!

Jiri Rivera shows off his zombie-self during the Zombie Tunnel 5k Fun Run at Cheyenne Mountain Air Force Station, Colorado, Oct. 20, 2017. The run was open to Front Range military members and their families. (U.S. Air Force photo by Airman 1st Class William Tracy)

Jiri Rivera shows off his zombie-self during the Zombie Tunnel 5k Fun Run at Cheyenne Mountain Air Force Station, Colorado, Oct. 20, 2017. The run was open to Front Range military members and their families. (U.S. Air Force photo by Airman 1st Class William Tracy)

Tech. Sgt. Kristine Kisamore, 21st Dental Squadron, applies moulage to a participant during the Zombie Tunnel 5k Fun Run at Cheyenne Mountain Air Force Station, Colorado, Oct. 20, 2017. 21st DS volunteers helped “zombify” some participants to give runners a fright. (U.S. Air Force photo by Airman 1st Class William Tracy)

Tech. Sgt. Kristine Kisamore, 21st Dental Squadron, applies moulage to a participant during the Zombie Tunnel 5k Fun Run at Cheyenne Mountain Air Force Station, Colorado, Oct. 20, 2017. 21st DS volunteers helped “zombify” some participants to give runners a fright. (U.S. Air Force photo by Airman 1st Class William Tracy)

Participants embark at the start of the Zombie Tunnel 5k Fun Run at Cheyenne Mountain Air Force Station, Colorado, Oct. 20, 2017. The run wound around Cheyenne Mountain, with zombies awaiting runners along the way. (U.S. Air Force photo by Airman 1st Class William Tracy)

Participants embark at the start of the Zombie Tunnel 5k Fun Run at Cheyenne Mountain Air Force Station, Colorado, Oct. 20, 2017. The run wound around Cheyenne Mountain, with zombies awaiting runners along the way. (U.S. Air Force photo by Airman 1st Class William Tracy)

Kyle Benton (left) gives runners a scare just before they enter the south portal of Cheyenne Mountain Air Force Station, Colorado, during the Zombie Tunnel 5k Fun Run, Oct. 20, 2017. The “zombies” were stationed just outside the tunnel in addition to along it’s length to provide an eerie atmosphere for the run. (U.S. Air Force photo by Steve Kotecki)

Kyle Benton (left) gives runners a scare just before they enter the south portal of Cheyenne Mountain Air Force Station, Colorado, during the Zombie Tunnel 5k Fun Run, Oct. 20, 2017. The “zombies” were stationed just outside the tunnel in addition to along it’s length to provide an eerie atmosphere for the run. (U.S. Air Force photo by Steve Kotecki)

Runners enter the south portal of Cheyenne Mountain Air Force Station, Colorado, during the Zombie Tunnel 5k Fun Run, Oct. 20, 2017. The run gave Front Range military members and their families an opportunity to have an inside look at Cheyenne Mountain AFS. (U.S. Air Force photo by Steve Kotecki)

Runners enter the south portal of Cheyenne Mountain Air Force Station, Colorado, during the Zombie Tunnel 5k Fun Run, Oct. 20, 2017. The run gave Front Range military members and their families an opportunity to have an inside look at Cheyenne Mountain AFS. (U.S. Air Force photo by Steve Kotecki)

Runners exit the north portal of Cheyenne Mountain Air Force Station, Colorado, during the Zombie Tunnel 5k Fun Run, Oct. 20, 2017. The run gave participants the opportunity to run the full length of the Cheyenne Mountain AFS tunnel. (U.S. Air Force photo by Steve Kotecki)

Runners exit the north portal of Cheyenne Mountain Air Force Station, Colorado, during the Zombie Tunnel 5k Fun Run, Oct. 20, 2017. The run gave participants the opportunity to run the full length of the Cheyenne Mountain AFS tunnel. (U.S. Air Force photo by Steve Kotecki)

PETERSON AIR FORCE BASE, Colo. --