Superconducting magnets are an enabling technology for high energy hadron colliders.  High field superconducting magnets are needed to increase beam energy and luminosity beyond the limits of present colliders (operational or close to operation). In this lecture series we will look at needs and options for high field accelerator magnets from the point of view of: conductors, coil fabrication technologies, magnetic and mechanical designs, magnet assembly, quench protection and lifetime issues. Possible applications will be presented as case studies.