The Kerrera Ferry is located 2 miles from Oban town centre on the southern Gallanach route, where there is some, though limited, parking available. In Oban, head towards the Calmac terminal but don’t turn in. Follow Kerrera Ferry signs from there.
It’s 20-30 minute walk from Oban to the the Kerrera Ferry or a few minutes in a taxi. There are currently no buses servicing the route.
If you’re coming from further afield, you can get to Oban from Glasgow by regular train (Queen Street Station) or bus (from Buchanan Street Station). Google or check the Scotrail website for timetables.