  The High Altitude Water Cherenkov (HAWC) gamma-ray observatory is a wide
field of view (1.8 Sr) and high duty cycle (>95% up-time) detector of unique
capabilities for the study of TeV gamma-ray sources. Installed at an altitude
of 4100m in the Northern slope of Volc\'an Sierra Negra, Puebla, by a
collaboration of about thirty institutions of Mexico and the United States,
HAWC has been in full operations since March 2015, surveying 2/3 of the sky
every sidereal day, monitoring active galaxies and mapping sources in the
Galactic Plane to a detection level of 1 Crab per day. This contribution
summarizes the main results of the first year of observations of the HAWC
gamma-ray observatory.
