Hi Peter56, it's couple of years since I was last there, but if memory serves it was a tarmac road to get there albeit a very basic tarmac road, and only the very last bit was gravel.
Not a loop walk, a lot of it is quite a narrow track up to and down the other side of the gorge itself, my 17yr old daughter and I did it each way in 2 1/2 hours so 5 in total, that was in August, we took 1 1/2 litres of water to drink between us and we ended up begging some on return journey.
It however is a walk you won't forget in a hurray, I assure you.