Current and near future Cosmic Microwave Background observations from Chile with the CLASS, POLARBEAR/Simons Array, ACT, and Simons Observatory experiments.

For more than a decade, cosmic microwave background (CMB) experiments have been elucidating properties of the early universe from the Parque Astronómico de Atacama in Northern Chile. Several recently commissioned observatories are poised to provide new information about the CMB's polarization, and others are in development for deployment to this unique high-altitude (5200 meter elevation) site. These instruments span a wide range of angular scales, instrument design approaches, and wavelength bands to reveal properties of the primordial and evolving universe while simultaneously mitigating sources of contamination, astrophysical and otherwise. All offer the opportunity to glimpse important aspects of fundamental physics. This talk will describe recent results, ongoing progress, and upcoming performance forecasts for the CLASS, POLARBEAR/Simons Array, ACT, and Simons Observatory experiments.