The high luminosity upgrade of the LHC will increase the datasets of the associated experiments by a factor of ten, essential for the observation of the higgs self-coupling, improving precision measurements of the SM, and continuing the search for SUSY. However, for the detectors this increase in luminosity is a problem. Increased radiation doses to the innermost detectors, an increase of simultaneous proton-proton interactions by a factor of 7, and 15 years worth of technology evolution means detectors and read out systems need to be upgraded. The CMS tracker, the closest to the interaction point, is no exception with a complete replacement of the entire 200 m2 of silicon planned, new 3D pixel sensors to be installed and tracks being provided to the CMS hardware trigger for the first time. This talk covers a range of upgrade activities for the CMS tracker from inner tracker innovation, outer tracker module design choices and the reconstruction of tracks in 4 microseconds at the full 40 MHz bunch crossing rate.
