I have seen it asked many times how to get to the Ek Balam site from Valladolid. Today in the ADO Valladolid terminal, I saw an advertisement for a very good option I had not seen before. According to the sign they offer bus service on Friday, Saturday and Sunday , departing from Valladolid at 830 AM for the short trip to Ek Balam and returning from EB at 1230PM. The cost is only 50 pesos round trip. Good schedule, great price!