Icmeler to Marmaris

We only go to Icmeler and I know we pass through Marmaris on way but never took much notice as too excited going or sad coming home to see how far it is. My daughter and her family are staying at Blue Bay on the front at Marmaris and we going out this week to Icmeler someone at the hotel has told her its one and a half hours walk Im sure thats not right anyone walked it please can you let me know Ta