The texture and grain boundary evolution during equal channel angular pressing (ECAP) of a spray-east Al-7034 (Al-Zn-Mg-Cu) alloy containing intermetallic particles with a range of sizes was studied through electron backscatter diffraction (EBSD). Up to 8 passes of ECAP using route Bc were employed. The initial ECAP pass leads to the development of low angle grain boundaries and subsequent passes lead to a relatively rapid increase in the fraction of high angle grain boundaries. Before ECAP, the material possessed a strong < 111 > and < 100 > fibre texture. On ECAP, the < 111 > fibre texture component is mostly retained but the < 100 > fibre develops to a Cube texture after the first ECAP pass. Goss textures form from about 4 passes of ECAP.