This data set corresponds to the simulation data presented in the article "Stellar versus Galactic: the intensity of cosmic rays at the evolving Earth and young exoplanets around Sun-like stars" (Rodgers-Lee, Taylor, Vidotto & Downes, MNRAS, 2021). Details of the stellar wind and cosmic ray model used for the simulations are available in the article. The data consists of the differential intensity of stellar and Galactic cosmic rays as a function of kinetic energy at different orbital distances from the star. The data is given for a number of different stellar rotation rates (omega). The first line gives the column headings. File names are formatted as "gcr_data_omegaXXX.dat" for the Galactic cosmic rays where "XXX" corresponds to the stellar rotation rate considered and "scr_data_omegaXXX.dat" for the stellar cosmic rays. The simulation details can be found in Table 1 of the article.