In reply to yorkshire_lad2:
Fairly certain you will have no issues as a walker. Last time I crossed (~3yrs) there's a car park at the gate, and an estate information board. There's two Corbetts accessed from there so there will be frequent walkers using it, also a hydro scheme, plus the residents of the lodge. Just go through the unlocked gates either side of the railway. Remember to visit Duinish bothy on the way, and enjoy your walk.
Google street view image from 2010:
https://www.google.com/maps/@56.8306052,-4.2214648,3a,90y,219.5h,80.44t/dat...