Minecraft wiki entry for Measuring_distance, associated text: Assume that one block's length is 1 yard. 1 mile is exactly 1760 yards. To measure 176 yards (1/10 of a mile), place your zero mark, then leave 7 block space between your next marker. Every second marker (ignoring the zero-mark), is 16 yards. Make a distinguished mark at the 11th 16 yards mark (zero-mark not included),