Neutrinos are the most enigmatic of all known elementary particles, able to penetrate kilometers of material and pass through the entire earth, emitted in enormous numbers by the sun and by nuclear reactors. New techniques are being invented to bring unprecedented precision to their study and understand their possible role in the creation of the Universe. The facilities being discussed will also advance the study of muons –– massive unstable “cousins” of the electron. The NuFact series of annual international workshops, of which this is the 11th, brings together members of all of the major groups involved in the planning of such future physics facilities for the free exchange and advancement of ideas.