Detailed Monte Carlo simulations of Ho magnetic thin films are here presented. The system is described by a Heisenberg model with easy-plane single-ion anisotropy and seven coupling constants, as obtained by experimental neutron scattering measurements. The critical behavior landscape comes out extremely complex and fascinating. In fact, for the analyzed thicknesses of 8–16, it is seen that by increasing the temperature the films show, after the distorted helical configuration, a temperature range where disordered inner planes coexist with surface ones in a block ordered state. At low temperature, it is also found that the progressive reduction in the number of layers do not imply a sudden helical order suppression but rather, as a consequence of surface effects, a gradual passage to a fanlike order, accompanied by the helix distortion, is observed.