The Lighthouse Walk is a nice easy excursion from Tobermory Harbour. Head towards the Calmac ferry port and take the path heading up hill into the trees. You can just keep on this path for an hour or so, until you reach the lighthouse. On the way you should have fantastic views of Ardnamurchan. On the way back you could try walking back over the golf course for some lovely views down the Sound of Mull. Watch out for stray golf balls though.