A 58-year-old Los Alamos man riding his bicycle along West Jemez Road between the Emergency Operations Center and Fire Station 5 was hit from behind by an older model Chrysler Mini Van Monday.
The accident occurred shortly after 2 p.m.
The bicyclist sustained severe injuries and was transported to Los Alamos Medical Center where he was immediately air lifted out.
He remains in the Intensive Care Unit of a hospital in Albuquerque.
The man driving the Mini Van was uninjured, according to police.